Machine-translated by Google. Questions are authored in English.
Top

MH SET 2025: 15 June, Paper II, Electronic Science

  • Date: 15 June 2025
  • Paper code: JUN-38225
  • Series: A
  • Language: Bilingual
  • 28 pages
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 1 of 28
Page 1 of 28
Text of page 1
Test Booklet Code & Serial No.
                                                                                                                               A
                                                                             Paper-II
                                                        ELECTRONIC SCIENCE
       Signature and Name of Invigilator                                                          Seat No.
       1. (Signature) .........................................                                                      (In figures as in Admit Card)
             (Name) ................................................                      Seat No. ..............................................................
       2. (Signature) .........................................                                                (In words)

             (Name) ................................................                  OMR Sheet No.
       JUN - 38225                                                                                                 (To be filled by the Candidate)
       Time Allowed : 2 Hours]                                                                                  [Maximum Marks : 200
       Number of Pages in this Booklet : 28                                                      Number of Questions in this Booklet : 100
                              Instructions for the Candidates
       1.          Write your Seat No. and OMR Sheet No. in the space provided              1.
                   on the top of this page.
       2.          This paper consists of 100 objective type questions. Each question
                   will carry two marks. All questions of Paper II will be compulsory.      2.
       3.          At the commencement of examination, the question booklet
                   will be given to the student. In the first 5 minutes, you are
                   requested to open the booklet and compulsorily examine it as             3.
                   follows :
                   (i)      To have access to the Question Booklet, tear off the                    (i)
                            paper seal on the edge of this cover page. Do not accept
                            a booklet without sticker-seal or open booklet.
                   (ii)     Tally the number of pages and number of questions in                    (ii)
                            the booklet with the information printed on the cover
                            page. Faulty booklets due to missing pages/questions
                            or questions repeated or not in serial order or any
                            other discrepancy should not be accepted and correct
                            booklet should be obtained from the invigilator within
                            the period of 5 minutes. Afterwards, neither the Question
                            Booklet will be replaced nor any extra time will be                     (iii)
                            given. The same may please be noted.
                   (iii)    After this verification is over, the OMR Sheet Number
                            should be entered on this Test Booklet.                         4.                     (A), (B), (C)   (D)
       4.          Each question has four alternative responses marked (A), (B),
                   (C) and (D). You have to darken the circle as indicated below on
                   the correct response against each item.
                   Example : where (B) is the correct response.                                              (B)

                                A                  C        D                                                        A              C       D
                   Following wrong methods should not be used as they are not                                                                 (Digitized)
                   recognised by scanning machine in digitized assessment.
                   Candidate using such method will be responsible for their loss.

CORRECT METHOD                          WRONG METHODS
                                                                           CORRECT METHOD                                WRONG METHODS
        C      D        A B C D        A B C D         A B C D      A B C D
                                                                                   C D                      A B C D      A B C D    A B C D      A B C D
       5.          Your responses to the items are to be indicated in the OMR
                   Sheet given inside the Booklet only. If you mark at any place            5.
                   other than in the circle in the OMR Sheet, it will not be evaluated.
       6.          Read instructions given inside carefully.                                6.
       7.          Rough Work is to be done at the end of this booklet.                     7.
       8.          If you write your Name, Seat Number, Phone Number or put
                   any mark on any part of the OMR Sheet, except for the space              8.
                   allotted for the relevant entries, which may disclose your
                   identity, or use abusive language or employ any other unfair
                   means, you will render yourself liable to disqualification.
       9.          You have to return original OMR Sheet to the invigilator at the
                   end of the examination compulsorily and must not carry it with           9.
                   you outside the Examination Hall. You are, however, allowed
                   to carry the Test Booklet and duplicate copy of OMR Sheet on
                   conclusion of examination.                                               10.
       10.         Use only Blue/Black Ball point pen.
       11.         Use of any calculator or log table, etc., is prohibited.                 11.
       12.         There is no negative marking for incorrect answers.                      12.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 2 of 28
Page 2 of 28
Text of page 2
JUN - 38225/II—A




2
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 3 of 28
Page 3 of 28
Text of page 3
JUN - 38225/II—A
                            Electronic Science
                                     Paper II
Time Allowed : 120 Minutes]                          [Maximum Marks : 200
Note : This Paper contains Hundred (100) multiple choice questions. Each question
       carrying Two (2) marks. Attempt All questions.

                                                2.   In semiconductor manufacturing,
1.   In the semiconductors, what is the
                                                     what does the term wafer refer to ?

     role of a doping ?                              (A) A thin slice of single-crystal
                                                         semiconductor material

     (A) It increases the bandgap of the             (B) The metallic layer on top of a
                                                         semiconductor device
         semiconductor material                      (C) The     insulation      material
                                                         between                 different
     (B) It introduces impurities to                     semiconductor layers

                                                     (D) The encapsulation material
         modify the electrical properties
                                                         used      in     semiconductor
                                                         packaging
         of the material
                                                3.   In a Zener diode, what is the
                                                     primary role of the depletion
     (C) It   enhances     the    thermal
                                                     region ?
                                                     (A) To increase the forward bias
         conductivity        of       the
                                                         current
                                                     (B) To provide mechanical support
         semiconductor
                                                         to the diode
                                                     (C) To     enhance    the    reverse
     (D) It decreases the resistivity of
                                                         breakdown voltage
                                                     (D) To reduce the capacitance of the
         the semoconductor material
                                                         diode

                                            3                                      [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 4 of 28
Page 4 of 28
Text of page 4
JUN - 38225/II—A

4.   How does an LCD pixel control the           6.   In the I-V curve of a solar cell, what
                                                      does the open-circuit voltage ( Voc )
     passage of light to create different
                                                      represent ?
     colors ?
                                                      (A) The maximum voltage the cell
     (A) By changing the pixel’s size                     can       generate         under

     (B) By altering the liquid crystal                   illumination

         alignment                                    (B) The voltage when the cell is not
                                                          exposed to light
     (C) By adjusting the backlight
                                                      (C) The voltage when the current
         intensity
                                                          is zero
     (D) By using a color filter
                                                      (D) The voltage when the cell is at
5.   What is the primary role of barrier                  maximum power point

     layers in quantum well devices ?            7.   What is the significance of the
                                                      ‘‘quantum Hall effect’’ observed in
     (A) To       increase         carrier
                                                      graphene ?
         concentration                                (A) It indicates the presence of a
                                                          bandgap in graphene
     (B) To      enhance       thermal
                                                      (B) It demonstrates the unique
         conductivity
                                                          behavior of charge carriers in
     (C) To confine charge carriers in                    graphene

         one dimension                                (C) It signifies the low thermal
                                                          conductivity of graphene
     (D) To reduce the overall device
                                                      (D) It is unrelated to the electronic
         size
                                                          properties of graphene

                                             4
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 5 of 28
Page 5 of 28
Text of page 5
JUN - 38225/II—A

8.   What is the unique structural               10. What is the primary advantage of

     feature of a carbon nanotube that               LED technology over traditional

     contributes to its exceptional
                                                     incandescent lighting ?
     strength ?
                                                     (A) Higher power consumption
     (A) Planar hexagonal lattice
                                                     (B) Longer lifespan
     (B) Rolling vector
                                                     (C) Limited color options
     (C) Quasi-one-dimensional structure
                                                     (D) Lower efficiency
     (D) Hexagonal Closed Packed

         Structure                               11. In X-ray Diffractometers, line

9.   What are potential applications of              intensities depend on .............. and

     ZnO in the field of optoelectronics ?           kind of atomic reflection centres in

     (A) Photovoltaic cells and light-               each set of plates.

         emitting diodes (LEDs)
                                                     (A) Number
     (B) Quantum computing devices
                                                     (B) Position
     (C) Superconductors and magnetic

         storage                                     (C) Length


     (D) Gas sensors and fuel cells                  (D) Distance between lines


                                             5                                       [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 6 of 28
Page 6 of 28
Text of page 6
JUN - 38225/II—A

12. A    sharp   peak     in   a   X-Ray        15. The energy band diagram of the
    Diffractogram represents :
                                                    MOS system when gate voltage is

    (A) Amorphous Material                          zero is :

    (B) Polymeric Material
                                                                                                           Ec
    (C) Highly Crystalline Structure                                                                       Ei
                                                    (A)   E Fm                                             EFp
                                                                                                           Ev
                                                                 Metal (A)              Semiconductor (S)
                                                                               Oxide
    (D) Conductor Material                                                              p-type




13. The chemical used for shielding the                     Metal (A)        Oxide     Semiconductor (S)
                                                                                       p-type


    active areas to achieve selective
                                                                                                            Ec
    oxide growth is :                                                                                       Ei
                                                    (B)                                                     EFp
                                                                     qVo                                    Ev
    (A) Silver Nitride                                    E Fm


    (B) Silicon Nitride
                                                             Metal (A)         Oxide       Semiconductor (S)

    (C) Hydrofluoric acid                                                                  p-type



                                                          EFm
                                                                                                               Ec
    (D) Polysilicon                                                    qVo
                                                    (C)                                                        Ei
                                                                                                               EFp
                                                                                                               Ev
14. The scaling factor of current density

    in constant voltage model is :
                                                                 Metal (A)    Oxide
    (A) 1/2
                                                                                          Semiconductor (S)
                                                                                          p-type




    (B) 1                                                                                                        Ec
                                                    (D)                                                          Ei
                                                                       qVo                                       EFp
    (C)  2                                               E Fm                                                   Ev



    (D) 2 /

                                            6
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 7 of 28
Page 7 of 28
Text of page 7
JUN - 38225/II—A

16. What is the Primary Function of the         19. Which of the following is used to

    Shift Register in A CCD ?                       obtain silicon single crystal structure

    (A) Data storage                                while     fabricating    integrating

    (B) Serial transfer of charge                   circuits ?

    (C) Analog-to-digital conversion
                                                    (A) Oxidation
    (D) Image processing
                                                    (B) Epitaxial growth
17. Which of the following design styles
                                                    (C) Photolithography
    provides higher integration density ?

    (A) Switch transistor logic                     (D) Silicon wafer preparations

    (B) Transistor buffer logic                 20. The pull up to pull down impedance

    (C) Transistor transistor logic                 ratio for an nMOS inverter driven

    (D) Circuit level logic                         by another nMOS inverter is .........

18. Which gives scalable design rules ?
                                                    (A) 8/1

    (A) Lambda rules
                                                    (B) 4/1
    (B) Micron rules
                                                    (C) 8/3
    (C) Layer rules

                                                    (D) 1/4
    (D) Thickness rules

                                            7                                      [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 8 of 28
Page 8 of 28
Text of page 8
JUN - 38225/II—A

21. What is the purpose of Norton’s           24. What does the term ‘‘cut-set’’ refer

    theorem ?                                     to in network analysis ?

    (A) Simplify parallel circuits                (A) A set of parallel resistors

    (B) Analyse AC circuits                       (B) A set of series resistors

    (C) Calculate equivalent resistance           (C) A combination of resistors and

                                                       capacitors
    (D) Determine open-circuit voltage
                                                  (D) A set of branches that, if cut,
22. Norton’s equivalent current is in
                                                       will divide the network into two
    parallel with :
                                                       parts
    (A) A resistor
                                              25. In filter design, what is the purpose
    (B) A capacitor
                                                  of the Butterworth approximation ?

    (C) An inductor
                                                  (A) To achieve a maximally flat

    (D) A voltage source                               response in the passband

23. The Laplace transform of a unit               (B) To minimize phase distortion in

    impulse function is :                              the stopband

    (A) 1/s                                       (C) To maximize the bandwidth of

    (B) e–st                                           the filter

    (C) (t)                                      (D) To ensure equal ripple in both

                                                       the passband and stopband
    (D) 1

                                          8
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 9 of 28
Page 9 of 28
Text of page 9
JUN - 38225/II—A

26. What does the term ‘‘poles and zeros
                                                 28. In filter design, what is the
    cancellation’’ imply in control system
                                                    significance of the transition
    theory ?

    (A) It results in an unstable system            bandwidth ?


    (B) It improves the transient                   (A) It represents the range of
         response of the system
                                                        frequencies with equal ripple in
    (C) It simplifies the transfer
                                                        the stopband
         function of the system

    (D) It reduces the order of the                 (B) It indicates the sharpness of the

         system
                                                        frequency transition between
27. What is the purpose of the Routh-
                                                        passband and stopband
    Hurwitz stability criterion ?

    (A) To determine the stability of a             (C) It is the range of frequencies

         control system
                                                        over which the filter exhibits a

    (B) To analyse power distribution
                                                        maximally flat response
         in electrical grids

    (C) To optimize the bandwidth of a              (D) It defines the frequency range

         communication system                           in which the filter has minimal

    (D) To design filters with optimal
                                                        group delay
         frequency response

                                             9                                    [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 10 of 28
Page 10 of 28
Text of page 10
JUN - 38225/II—A

29. In filter design, what is the                     31. What does the symbol IGSS
    significance of the transition
                                                         represent in the context of a JFET ?
    bandwidth ?

    (A) It represents the range of                       (A) Drain current
         frequencies with equal ripple in
                                                         (B) Gate-source voltage
         the stopband

    (B) It indicates the sharpness of the                (C) Gate current when the gate-
         frequency transition between
                                                             source junction is forward-
         passband and stop-band
                                                             biased
    (C) It is the range of frequencies
         over which the filter exhibits a                (D) Gate current when the gate-
         maximally flat response
                                                             source junction is reverse-biased
    (D) It defines the frequency range
         in which the filter has minimal              32. What   information       does   the

         group delay                                     measurement of dc beta provide

30. The multiplication of two discrete                   about a bipolar junction transistor ?
    Fourier transforms (DFTs) is equal
    to the ............... of two sequences in           (A) Voltage drop across the collector

    the time domain.                                         resistor

    (A) Circular convolution
                                                         (B) Gain bandwidth product
    (B) Auto-correlation
                                                         (C) Current gain characteristics
    (C) Linear convolution

    (D) Cross-correlation                                (D) Base-emitter voltage threshold

                                                 10
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 11 of 28
Page 11 of 28
Text of page 11
JUN - 38225/II—A

33. What is the purpose of inverting            35. Which of the following is true about

                                                    the FET as its advantage ?
    (–) and non-inverting (+) input

    terminals     on   an   operational             (A) Low input resistance

    amplifier ?                                     (B) High output resistance


    (A) Determine Op-Amp’s power                    (C) Big size, small life

        supply                                      (D) Better thermal stability

                                                36. What is fractional –N frequency
    (B) Control gain of Op-Amp
                                                    synthesis in PLLs and is it used ?
    (C) Define the amount of feedback
                                                    (A) It involves using fractional
    (D) Provide input signals for                        values in the frequency divider

        differential amplification                       to achieve finer frequency

                                                         resolution
34. The phase difference between the
                                                    (B) It utilizes non-integer division
    input and output voltages in a
                                                         ratios to improve phase noise
    common base arrangement is .........
                                                         performance

    (A) 180º                                        (C) It refers to using fractional

                                                         values VCO control voltage
    (B) 90º

                                                    (D) It is technique to eliminate
    (C) 270º
                                                         spurious signals in the PLL
    (D) 0º                                               output

                                           11                                    [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 12 of 28
Page 12 of 28
Text of page 12
JUN - 38225/II—A


37. ................. oscillator can be used        39. Instrumentation amplifier is best

                                                        suited for ..........
     where high stability of frequency is

     required.                                          (A) Detection           of   signal   from

                                                             photodiode
     (A) Wien bridge
                                                        (B) Detection of output from load
     (B) Crystal
                                                             cell

     (C) Hartley
                                                        (C) Detection           of   signal   from

     (D) Colpitts                                            distance stars


                                                        (D) Detection of signal from RF
38. Which of the following ICs is the

                                                             transponder
     standard IC used for V to F

                                                    40. Which of the following IC does not
     conversion ?
                                                        belong to voltage regulator class ?
     (A) 741
                                                        (A) 7805
     (B) 7400
                                                        (B) 7905

     (C) 566
                                                        (C) LM 723

     (D) 723
                                                        (D) NE536

                                               12
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 13 of 28
Page 13 of 28
Text of page 13
JUN - 38225/II—A

41. What type of gates are NAND and           44. In a 4-bit ripple counter, how many

    NOR gates considered to be ?                   clock pulse are required for a

                                                   complete counting cycle ?
    (A) Special-purpose gates

                                                   (A) 4
    (B) Complex gates
                                                   (B) 8
    (C) Standard logic gates
                                                   (C) 16
    (D) Outdated gates
                                                   (D) 2
42. What is the primary building block
                                              45. .............. is used to carry digital data
    of a CPLD ?
                                                   on analog lines.
    (A) Flip-flop
                                                   (A) Modem
    (B) Gate
                                                   (B) Demodulator
    (C) Block RAM
                                                   (C) Modulator

    (D) Macro cell
                                                   (D) Multiplexer

43. What is the primary building block        46. Modulo 6 counter can be built with
    of an FPGA ?                                   .............. flip flops.

    (A) Macro cell                                 (A) 2

    (B) Gate                                       (B) 3

    (C) Look-Up Table (LUT)                        (C) 4

                                                   (D) 6
    (D) Flip-flop

                                         13                                           [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 14 of 28
Page 14 of 28
Text of page 14
JUN - 38225/II—A

47. The type of register, in which we                  50. ................. is an example of a

     have access only to leftmost and                      combinational circuit.

     rightmost feedback :                                  (A) Shift Registers

     (A) Parallel in serial out register                   (B) Counters

     (B) Serial in serial out register                     (C) Flip flops
     (C) Shift left and shift right register
                                                           (D) Multiplexers
     (D) Serial in parallel out register
                                                       51. Why do we need a ULN2003 in
48. In FSM diagram what does circle                        driving a stepper motor from 8051
     represent ?                                           port ?

     (A) State                                             (A) for switching the motor ON and

     (B) Change of state                                        OFF

     (C) Output value                                      (B) for increasing the current

     (D) Initial state                                     (C) for increasing the power

49. ................... are employed to specify            (D) for auto shut off on short circuit

     parameters that can be supplied to                52. Which of the following signal
     VHDL entities.                                        controls the flow of data ?

     (A) Port numbers                                      (A) RTS

     (B) Packages                                          (B) DTR

     (C) Declarations                                      (C) RTS and DTR

     (D) Generics                                          (D) ECNR

                                                  14
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 15 of 28
Page 15 of 28
Text of page 15
JUN - 38225/II—A

53. If we push data onto the stack, then        55. The function of Execution Unit is :
    the stack pointer :
                                                     (A) Encoding
    (A) increases with every push
                                                     (B) Decoding
    (B) decreases with every push
                                                     (C) Processing
    (C) increases and decreases with

         every push                                  (D) Calculations

    (D) doesn’t change
                                                56. The JS is called as ...............
54. What steps are followed when we
                                                     (A) jump the signed bit
    need to turn on any timer ?
                                                     (B) jump single bit
    (A) load the count, start the timer,

         keep monitoring it, stop the                (C) jump simple bit

         timer
                                                     (D) jump signal it
    (B) load the TMOD register, load the
                                                57. Which microprocessor accepts the
         count, start the timer, keep
                                                     program written for 8086 without
         monitoring it, stop the timer
                                                     any changes ?
    (C) load the TMOD register, start

         the timer, load the count, keep             (A) 8085

         monitoring it, stop the timer
                                                     (B) 8051
    (D) load the count, divide TCON by
                                                     (C) 8057
         2, start the timer, keep

         monitoring it, stop the timer               (D) 8088

                                           15                                         [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 16 of 28
Page 16 of 28
Text of page 16
JUN - 38225/II—A

58. Match the following :                               59. If the ............. pin is .........., then we

                      List I                                  have the option of using the .........
    (1) TCON                                                  ROM or EPROM together with .......
    (2) SBUF
                                                              memory and devices.
    (3) TMOD
                                                              (A) EA, high, internal, external
    (4) PSW
                                                              (B) EA, low, internal, external
    (5) PCON

                  List II                                     (C) EA, high, external, internal

    (i)   contains status information
                                                              (D) EA, low, external internal
    (ii) timer/counter control register
                                                        60. Which of the following Buses is/are
    (iii) idle bit, power down bit
                                                              present in a microcontroller for
    (iv) serial data buffer for Tx and Rx
                                                              transferring data from one place to
    (v) timer/counter                modes    of
          operation                                           another ?

    Codes :                                                   (A) Data bus only

          (1)   (2)     (3)    (4)    (5)
                                                              (B) Data Bus, Address Bus
    (A) (ii) (iv) (v)          (i)    (iii)
                                                              (C) Address Bus
    (B) (i)     (v)     (iv) (iii)    (ii)

    (C) (v)     (iii) (ii) (iv)       (i)                     (D) Address Bus, Data Bus, Control

    (D) (iii) (ii)      (i)    (v)    (iv)                         Bus

                                                   16
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 17 of 28
Page 17 of 28
Text of page 17
JUN - 38225/II—A

61. In charge free space, the Poisson           64. In free space, which of the following
    equation becomes :
                                                    will be zero ?
    (A) Maxwell equation
                                                    (A) Permittivity
    (B) Ampere equation
                                                    (B) Permeability
    (C) Laplace equation

    (D) Steady state equation                       (C) Conductivity

62. The total number of magnetic field              (D) Resistivity
    lines passing through an area is
                                                65. A wave incident on a surface at an
    termed as :

                                                    angle 60 degree is having field
    (A) Voltage
                                                    intensity of 6 units. The reflected
    (B) EMF
                                                    wave is at an angle of 30 degrees.
    (C) Magnetic flux
                                                    Find the field intensity after
    (D) Magnetic flux density
                                                    reflection.
63. Which of the following laws does not

    form a Maxwell equation ?                       (A) 9.4

    (A) Planck’s law
                                                    (B) 8.4
    (B) Gauss’s Law
                                                    (C) 10.4
    (C) Faraday’s law
                                                    (D) 7.4
    (D) Ampere’s Law

                                           17                                     [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 18 of 28
Page 18 of 28
Text of page 18
JUN - 38225/II—A


66. An example for lossless propagation         68. The radiation resistance of an

                                                    antenna having a power of 120 units
    is :
                                                    and antenna current of 5A is :

    (A) Dielectric waveguide propagation
                                                    (A) 4.8

    (B) Conductor propagation                       (B) 9.6


    (C) Cavity resonator propagation                (C) 3.6


                                                    (D) 1.8
    (D) Not practically possible
                                                69. Copper behaves as a :
67. An     example     for    usage   of
                                                    (A) Conductor always

    electromagnetic wave propagation
                                                    (B) Conductor      or    dielectric

    is :                                                depending on the applied

                                                        electric field strength
    (A) refrigerator
                                                    (C) Conductor      or    dielectric

    (B) electric fan                                    depending on the frequency

                                                    (D) Conductor      or    dielectric
    (C) mobile transponder
                                                        depending on the electric

    (D) relays in actuators                             current density


                                           18
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 19 of 28
Page 19 of 28
Text of page 19
JUN - 38225/II—A

70. The modes in a rectangular                  72. The characteristic of a radio receiver
    waveguide are denoted by TEmn/                   associated with true reproduction of
    TMmn, where m and n are the Eigen                audio signal is :
    values along the larger and smaller
                                                     (A) Sensitivity
    dimensions of the waveguide
                                                     (B) Selectivity
    respectively. Which one of the
    following statements is true ?                   (C) Image rejection

    (A) The TM10 mode does not exist                 (D) Fidelity

    (B) The TE10 mode does not exist            73. The wavelength for a frequency of
                                                     25 MHz is :
    (C) The TE10 and TM10 both exist
        and    have    same     cut-off              (A) 15 metres

        frequencies                                  (B) 4 metres

    (D) When m and n are increased,                  (C) 12 metres
        the cut-off frequency decreases
                                                     (D) 32 metres
71. The refractive index variation of a
                                                74. Which      of   the    following    is
    singal mode fiber is :
                                                     disadvantage of FM over AM ?
    (A) Gradual from core to cladding                (A) less modulating power is

    (B) Increasing from core to cladding                 required

    (C) Step change from core to                     (B) better noise immunity is

        cladding                                         provided

                                                     (C) higher bandwidth is required
    (D) Linear change from core to

        cladding                                     (D) carrier is of any shape

                                           19                                      [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 20 of 28
Page 20 of 28
Text of page 20
JUN - 38225/II—A

75. If the noise figures of the first stage          77. Intermodal dispersion occurring in

     of a two stage cascade network is                   a large amount in multimode step

     8 dB and the noise figure of the                    index fiber results in ................ .

     second stage is 7 dB and the gain
                                                         (A) Propagation of the fiber
     of the first stage is 10, then the noise
                                                         (B) Propagating through the fiber
     figure of the cascade is :

                                                         (C) Pulse broadening at output
     (A) 8.6 dB

                                                         (D) Attenuation of waves
     (B) 7.6 dB


     (C) 5.6 dB                                      78. The internal quantum efficiency of

                                                         LEDs decreases ..............................
     (D) 8.9 dB
                                                         with temperature.
76. Bluetooth is an example of :

                                                         (A) Exponentially, decreasing
     (A) Wide area network

                                                         (B) Exponentially increasing
     (B) Virtual private network

                                                         (C) Linearly, increasing
     (C) Local area network

                                                         (D) Linearly, decreasing
     (D) Personal area network

                                                20
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 21 of 28
Page 21 of 28
Text of page 21
JUN - 38225/II—A

                                                81. In a SCR circuit, the angle of
79. Which technology is used by the
                                                    conduction can be changed by
    backscatter measurement method ?
                                                    changing :

    (A) Refraction                                  (A) anode voltage

                                                    (B) anode current
    (B) Francis flat recovery
                                                    (C) forward current rating
    (C) Optical      time       domain
                                                    (D) gate current
        reflectometry
                                                82. A half-wave thyristor converter

                                                    supplies a purely inductive load, as
    (D) Optical frequency
                                                    shown in Fig. If the triggering angle
80. Which of the following is the way               of the SCR is 120º, the extinction

                                                    angle will be :
    in which an IoT device is associated

    with data ?
                                                               +
                                                      Vinsin t              L
    (A) Internet


    (B) Cloud                                       (A) 240º

                                                    (B) 180º
    (C) Automata
                                                    (C) 200º
    (D) Network
                                                    (D) 120º

                                           21                                     [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 22 of 28
Page 22 of 28
Text of page 22
JUN - 38225/II—A

83. A dc to dc transistor chopper               84. In the SCR tap-switch inverter,
                                                    when SCR1 is fired :
   supplied from a fixed voltage dc
                                                    (A) positive peak of the ac O/P is
   source   feeds   afixed-resistive-
                                                         obtained
   inductive load and a free-wheeling
                                                    (B) negative peak of the O/P is
   diode. The chopper operates at 1 kHz
                                                         obtained
   and 50% duty cycle. Without
                                                    (C) two-third to peak value is
   changing the value of the average
                                                         obtained
   dc current through the load, if it is
                                                    (D) one-third of the peak value is
   desired to reduce the ripple content                  obtained

   of load current, the control action
                                                85. It is required to drive a d.c. shunt
   needed will :                                    motor at different speeds in both the

                                                    directions (forward and reverse) and
   (A) increase the chopper frequency
                                                    also to break it in both the directions
       and duty cycle in equal ratio
                                                    which one of the following would you

   (B) increase the chopper frequency               use ?

       keeping the duty cycle constant              (A) a half-controlled thyristor-

                                                         bridge
   (C) decrease only the chopper
                                                    (B) a full-controlled thyristor-bridge
       frequency
                                                    (C) a dual converter
   (D) decrease only the duty cycle
                                                    (D) a diode bridge

                                           22
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 23 of 28
Page 23 of 28
Text of page 23
JUN - 38225/II—A

86. The speed and torque of induction            88. A closed loop system is distinguished
    motors can be varied by which of the
                                                     from open loop system by one of the
    following means ?
                                                     following :
    (A) Chopper voltage control

                                                     (A) Servo mechanism
    (B) Rotor voltage control

    (C) Current control                              (B) Feedback

    (D) Stator voltage, rotor voltage and
                                                     (C) Output pattern
        frequency control

                                                     (D) Input pattern
87. Which of the following statements

    is not necessarily correct for open
                                                 89. A system with gain margin close to
    control system ?
                                                     unity or a phase margin close to zero
    (A) Input command is the sole
                                                     is :
        factor responsible for providing

        the control action                           (A) Highly stable

    (B) Presence of non-linearity causes
                                                     (B) Oscillatory
        malfunctioning

    (C) Less expensive                               (C) Relatively stable


    (D) More expensive
                                                     (D) Unstable


                                            23                                     [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 24 of 28
Page 24 of 28
Text of page 24
JUN - 38225/II—A


90. The transient response of a
                                           92. One of the following transducers is

    system is mainly due to :                  very popular for measurement of

                                               rotational displacements :
    (A) inertia forces

                                               (A) Shaft encoder
    (B) internal forces

                                               (B) Differential capacitor
    (C) stored energy

                                               (C) LVDT
    (D) friction

                                               (D) Strain gauge
91. Which of the following is most
                                           93. What is the name of a device that
    commonly used IOT standards for
                                               converts sound waves to electrical
    Medium Access Control (MAC) ?
                                               waves ?

    (A) IEEE802.15.4
                                               (A) an amplifier

    (B) IEEE802.11ah
                                               (B) a recorder


    (C) IEEE 2413                              (C) a filter


    (D) IEEE11073                              (D) a microphone


                                      24
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 25 of 28
Page 25 of 28
Text of page 25
JUN - 38225/II—A

94. For a measuring system, dynamic                  96. Which part is called as heart of

    sensitivity is required to be ...........            CRO ?

    of static sensitivity.                               (A) CRT


    (A) + 2%                                             (B) Sweep generator


    (B) + 5%                                             (C) Trigger circuit


    (C) + 10%                                            (D) Amplifier


    (D) + 20%                                        97. The process of obtaining the


95. For a measurement, indicated value                   spectrum of a given signal using the


    is 225 V while true value is 226 V.                  basic mathematical tools is known


    What will be the static error of                     as :


    instrument ?                                         (A) time domain analysis

    (A) 1 V
                                                         (B) mathematical analysis

    (B) –1 V
                                                         (C) spectral analysis

    (C) 0.5 V
                                                         (D) pseudo analysis
    (D) –0.5 V

                                                25                                    [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 26 of 28
Page 26 of 28
Text of page 26
JUN - 38225/II—A


                                              99. From equipment point of view, the
98. Strain gauge is a :

                                                  respiratory system in the human
    (A) active device and converts
                                                  body is a ...................... system.
        mechanical displacement into a

                                                  (A) Hydraulic
        change of resistance

                                                  (B) Pneumatic
    (B) passive device and converts

                                                  (C) Mechanical
        electrical displacement into a


        change of resistance                      (D) Electrical


                                              100. Home blood glucose sensor works on
    (C) passive device and converts

                                                  which principle ?
        mechanical displacement into a


        change of resistance                      (A) Electrophysiological



    (D) active device and converts                (B) Electrochemical


        electrical displacement into a            (C) Physio-chemical


        change of resistance                      (D) Chemical


                                         26
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 27 of 28
Page 27 of 28
Text of page 27
JUN - 38225/II—A

ROUGH WORK




    27                 [P.T.O.
MH SET 2025 question paper, 15 June 2025, Paper II, Electronic Science, page 28 of 28
Page 28 of 28
Text of page 28
JUN - 38225/II—A

ROUGH WORK




    28
Page 1 of 28

Source: Savitribai Phule Pune University. Question paper published by Savitribai Phule Pune University.