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MH SET 2024: 7 April, Paper II, Electronic Science

  • Date: 7 April 2024
  • Paper code: APR-38224
  • Series: A
  • Language: Bilingual
  • 24 pages
MH SET 2024 question paper, 7 April 2024, Paper II, Electronic Science, page 1 of 24
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Test Booklet Code & Serial No.
                                                                                                                     A
                                                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.
APR - 38224                                                                                         (To be filled by the Candidate)
Time Allowed : 2 Hours]                                                                                 [Maximum Marks : 200
Number of Pages in this Booklet : 24                                                     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            3.
           requested to open the booklet and compulsorily examine it as
           follows :
           (i)      To have access to the Question Booklet, tear off the
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                    or questions repeated or not in serial order or any
                    other discrepancy should not be accepted and correct
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                    should be entered on this Test Booklet.
4.         Each question has four alternative responses marked (A), (B),
           (C) and (D). You have to darken the circle as indicated below on         4.                     (A), (B), (C)    (D)
           the correct response against each item.
           Example : where (C) is the correct response.

                              A        B                 D                                           (C)
5.         Your responses to the items are to be indicated in the OMR                                      A        B               D
           Sheet given inside the Booklet only. If you mark at any place
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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.
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           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.
11.        Use of any calculator or log table, etc., is prohibited.
12.        There is no negative marking for incorrect answers.                      12.
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APR - 38224/II—A




2
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APR - 38224/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.

1.   What is the main purpose of a              3.   What type of backlighting is

     Schottky diode in semiconductor                 commonly used in LCD displays for

     applications ?                                  improved color reproduction ?


     (A) Voltage regulation                          (A) Fluorescent backlighting

                                                     (B) Incandescent backlighting
     (B) High-speed switching

                                                     (C) LASER backlighting
     (C) Temperature sensing
                                                     (D) OLED backlighting
     (D) Power amplification
                                                4.   What is the purpose of connecting
2.   What is the primary advantage of
                                                     a resistor in series with a Zener diode
     using a Gallium Nitride (GaN)
                                                     in a voltage regulator circuit ?
     semiconductor over traditional
                                                     (A) To increase the breakdown
     silicon in power electronics ?
                                                         voltage
     (A) Higher electron mobility
                                                     (B) To limit the forward bias
     (B) Lower bandgap                                   current

     (C) Greater thermal stability                   (C) To decrease the reverse bias

     (D) Improved      resistance      to                voltage

         radiation                                   (D) To provide mechanical stability

                                            3                                       [P.T.O.
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5.   Which type of low-dimensional                7.   What is the role of the ‘‘Dirac cones’’
                                                       in the electronic structure of
     semiconductor device is known for
                                                       graphene ?
     its ability to confine charge carriers
                                                       (A) They represent the valence and
     in all three dimensions ?
                                                           conduction bands

     (A) Quantum wells                                 (B) They indicate the presence of a
                                                           bandgap
     (B) Quantum wires
                                                       (C) They show the dispersion
     (C) Quantum dots                                      relation of electrons

     (D) Quantum cascade devices                       (D) They enhance the magnetic
                                                           properties of graphene
6.   What is the role of the series
                                                  8.   How does the chirality of a carbon
     resistance in the I-V characteristics
                                                       nanotube affect its electronic
     of a solar cell ?                                 properties ?

     (A) To reduce the open-circuit                    (A) It determines whether the
                                                           nanotube       is   metallic    or
         voltage
                                                           semiconducting
     (B) To decrease the short-circuit
                                                       (B) It affects the mechanical
         current                                           strength of the nanotube

     (C) To limit the current flow in the              (C) It influences the thermal
                                                           conductivity of the nanotube
         external circuit
                                                       (D) It is unrelated to the electronic
     (D) To maximize the fill factor
                                                           properties of nanotubes

                                              4
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9.   How does ZnO exhibit both                   11. Which of the following statements
                                                     is true in case of CMOS fabrication ?
     semiconducting and piezoelectric

     properties simultaneously ?                     (A) Fabrication of n-mos transistor
                                                         requires few additional steps
     (A) Through the manipulation of                     compared to p-MOS transistor
         doping concentration
                                                     (B) Fabrication on n-MOS is same

     (B) Due to its wurtzite crystal                     as that of p-MOS transistor

         structure                                   (C) Fabrication on n-MOS is
                                                         different from that of p-MOS
     (C) By controlling the synthesis
                                                         transistor
         temperature
                                                     (D) Fabrication of p-MOS transistor
     (D) It does not possess piezoelectric               requires few additional steps
                                                         compared to n-MOS transistor
         properties
                                                 12. EDAX is a technique used in
10. In an LED, what is the function of
                                                     conjunction with SEM for :
     the p-n junction ?
                                                     (A) Energy dispersive analysis of
     (A) To modulate the intensity of                    X-rays

         light                                       (B) Energy levels occupied by
                                                         electrons excited by X-rays
     (B) To amplify the input signal
                                                     (C) Electron diffraction analysis of
     (C) To emit light when forward-
                                                         X-ray excitations
         biased
                                                     (D) Obtaining higher magnification
     (D) To store electrical charge                      levels

                                             5                                    [P.T.O.
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13. The isolated active areas are created        16. What does CCD stand for ?
    by technique known as ................
                                                     (A) Control Circuit Design
    (A) Selective deposition of field-
                                                     (B) Central Core Database
         oxide isolation

    (B) Local Oxidation of Silicon                   (C) Charge-Coupled Device

    (C) Etched field-oxide isolation or              (D) Composite Camera Device

         Local Oxidation of Silicon
                                                 17. As die size shrinks. the complexity
    (D) Reverse biased pn junction
                                                     of making the photomasks ...........

14. The gate delay is proportional to :
                                                     (A) increases
    (A) Ron.Cg
                                                     (B) decreases
    (B) Rs.Cds
                                                     (C) remains the same
    (C) Rd.Cgs
                                                     (D) cannot be determined
    (D) Ron.Cox
                                                 18. The minimum width of n-diffusion
15. At threshold voltage, the surface

    potential is :                                   and p-diffusion layer should be :


    (A) Negative Fermi potential                     (A) 3

    (B) Fermi potential                              (B) 2

    (C) 2 Fermi potential                            (C)

    (D) –2 Fermi potential
                                                     (D) 4

                                             6
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19. Where are the silicon wafers placed             22. In a parallel resonant circuit, the

    in the reaction chamber for the                     impedance is minimum at :
    epitaxial growth process ?
                                                        (A) Resonant frequency
    (A) Cup
                                                        (B) Half the resonant frequency
    (B) Boats
                                                        (C) Double the resonant frequency
    (C) Ingots

    (D) Crucible                                        (D) Quarter the resonant frequency

20. As per lambda design rules for wires            23. Norton’s equivalent current source

    minimum width of metal 2 is .............           is connected in :
    and separation between two metal
                                                        (A) Series with the load
    2 layers .....................

    (A) 4 lambda, 4 lambda                              (B) Parallel with the load

    (B) 3 lambda, 3 lambda                              (C) Series with the source

    (C) 4 lambda, 3 lambda                              (D) Parallel with the source

    (D) 3 lambda, 4 lambda                          24. The unit step response of a first-

21. In an AC circuit, the power factor                  order system exhibits :
    is the cosine of the :
                                                        (A) Oscillations
    (A) Voltage angle
                                                        (B) Exponential rise
    (B) Current angle
                                                        (C) Exponential decay
    (C) Phase angle
                                                        (D) Sine wave behaviour
    (D) Resistance angle

                                                7                                    [P.T.O.
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25. In network synthesis, what is the         27. What is the purpose of the Bode plot

                                                  in network analysis ?
    role of the Hurwitz criterion ?

                                                  (A) To represent the step response
    (A) To determine the stability of a
                                                       of a system
        control system
                                                  (B) To visualize the frequency
    (B) To check the realizability of a                response of a system

        network
                                                  (C) To analyze the transient

    (C) To analyze the frequency                       behavior of a circuit

        response of a circuit                     (D) To plot the time domain

                                                       behavior of a network
    (D) To evaluate the accuracy of
                                              28. What is the purpose of the Smith
        numerical methods in solving
                                                  predictor in control system design ?
        circuits
                                                  (A) To compensate for time delays
26. The Smith chart is primarily used
                                                       in the system
    for the analysis of :
                                                  (B) To enhance the transient

    (A) Transmission lines                             response of the system

                                                  (C) To reduce overshoot in the step
    (B) Filters
                                                       response
    (C) Log Amplifiers
                                                  (D) To improve the frequency
    (D) Oscillators                                    response of the system

                                          8
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29. The concept of ‘‘duality’’ in network       31. What does the hFE value represent
                                                    in       the       common-emitter
    synthesis refers to :
                                                    configuration ?
    (A) The relationship between input
                                                    (A) Reverse current transfer ratio
         and output signals in a system
                                                    (B) Output impedance
    (B) The interchangeability of
                                                    (C) Voltage gain
         resistors and capacitors in a
                                                    (D) Forward current transfer ratio
         network
                                                32. How does the Schmitt trigger
    (C) The dual representation of a                eliminate the erratic operation in the
         network in terms of nodes and              op-amp comparator ?
         branches                                   (A) By reducing the sensitivity

    (D) The ability of a network to                 (B) By    introducing      negative
         exhibit both series and parallel                feedback

         elements                                   (C) By using positive feedback

30. Consider the signal x[n] = 2n u[n]              (D) By increasing the reference
                                                         voltage
    having Z-transform as X(z) with

    ROC R. The inverse Z transform              33. What is the main disadvantage of
                                                    half-wave rectifier compared to full
    for X (2z) will be :
                                                    wave rectifier ?
    (A) u[n]
                                                    (A) Higher cost
    (B) 2n u[n]                                     (B) Lower efficiency

    (C) 4u u[n]                                     (C) Limited voltage output

    (D) 22n u[n]                                    (D) More complex circuitry

                                            9                                     [P.T.O.
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                                                 36. Explain the concept of phase noise
34. In any circuit connections, what is
                                                     in the context of PLLs :
    the biasing direction for the emitter            (A) Phase noise is the phase
                                                            deviation between the reference
    and collector of a transistor ?
                                                            and feedback signals

    (A) Both are forward biased                      (B) Phase noise is the undesirable
                                                            random fluctuations in the
                                                            phase of the output signal
    (B) Both are reverse biased
                                                     (C) Phase noise is the intentional

    (C) Emitter is forward, and collector                   modulation     of   the   VCO
                                                            frequency
         is reverse biased
                                                     (D) Phase noise is the difference in
                                                            phase between the input and
    (D) Emitter is reverse, and collector                   output of the phase comparator

         is forward biased                       37. Oscillators operate on the principles
                                                     of .............

35. In a CE configuration, an emitter                (A) Signal feedthrough
                                                     (B) Positive feedback
    resistor is used for ...............
                                                     (C) Negative feedback

    (A) Stabilization                                (D) Ultra high gain
                                                 38. Following circuits can be used as
    (B) AC signal bypass                             voltage to frequency converter :
                                                     (A) Astable multivibrator
    (C) Collector bias                               (B) Crystal oscillator
                                                     (C) Schmitt trigger
    (D) Higher gain
                                                     (D) CE amplifier

                                            10
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39. What is the advantage of using IC           42. What does SPLD stand for in the

    LM725 ?                                         context described ?

                                                    (A) Simple Programming Logic
    (A) Very high gain
                                                        Device
    (B) Very high BW
                                                    (B) Sequential Programmable Logic
    (C) High CMRR                                       Device

    (D) High slew rate                              (C) Systematic PLD

                                                    (D) Structured Programming and
40. Which of the following units is used
                                                        Logic Device
    to convert square wave into
                                                43. Which    statement        accurately
    triangular wave ?
                                                    describes the programming of an
    (A) Differentiator                              FPGA ?

    (B) Integrator                                  (A) FPGA       programming         is
                                                        permanent and cannot be
    (C) Schmitt trigger
                                                        changed.
    (D) Monoshot multivibrator
                                                    (B) FPGA programming is done
41. How is the complement nature of                     using machine code
    NOR represented in its graphic                  (C) FPGA programming is done
    symbol ?                                            using hardware description
                                                        languages (HDLs) or schematic
    (A) A small square
                                                        entry
    (B) A small triangle
                                                    (D) FPGA programming is only
    (C) A small circle                                  possible   in     a   controlled

    (D) A small diamond                                 laboratory environment

                                           11                                     [P.T.O.
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44. What is the role of the Global Clock              47. The expression for number of modulo
     Network in CPLD ?                                     of a ripple counter with ‘n’ flip-flop

     (A) It synchronizes all clock signal                  is :

          in the devices                                   (A) 2 n
     (B) It is responsible for configuring
                                                           (B) n
          the entire devices
                                                           (C) 2n – 1
     (C) It has no impact on timing
          constraints                                      (D) n 2

     (D) It     is   used      for    power           48. Output values of Moore type FSM

          consumption                                      are determined by its ..............

45. For design of 16 : 1 MUX how many                      (A) Clock input
     select lines are required ?
                                                           (B) Current state
     (A) 1
                                                           (C) Input values
     (B) 2
                                                           (D) Output values
     (C) 3
                                                      49. VHDL ..................... represents a
     (D) 4
                                                           component's external behavior and
46. A decoder converts ‘n’ inputs to .........             interface.
     outputs.
                                                           (A) Signal
     (A) n
                                                           (B) Port
     (B) n 2
                                                           (C) Entity
     (C) 2 n
                                                           (D) Architecture
     (D) n n
                                                 12
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50. Race Around condition can be                53. What is the status of the carry,
    avoided in digital logic circuits               auxiliary carry and parity flags after
    using :                                         executing following instructions ?

    (A) Shift register                              MOV A,#9C

    (B) Full adder                                  ADD A.#64H

    (C) AND gate                                    (A) CY = 0, AC = 0, P = 0

                                                    (B) CY = 1, AC = l, P = 0
    (D) Master slave JK flip-flop
                                                    (C) CY = 0, AC = 1, P = 0
51. The configuration in which each
                                                    (D) CY = l, AC = l, P = 1
    LED receives operating current of
    8 mA from power supply while the            54. What is the frequency of the clock
    port lines sink the current on each             that is being used as the clock source
    port line is :                                  for the timer ?

    (A) driver configuration                        (A) some         externally          applied
                                                          frequency f’
    (B) common anode configuration
                                                    (B) controller’s crystal frequency f
    (C) common cathode configuration
                                                    (C) controller’s crystal frequency/12
    (D) buffer configuration
                                                    (D) externally applied frequency/12
52. If no key is pressed microcontroller
                                                55. In 8086 microprocessor, the address
    8051 port will read :
                                                    bus is ......................... bit wide.
    (A) 0
                                                    (A) 12 bit
    (B) 1                                           (B) 10 bit

    (C) NC                                          (C) 16 bit

    (D) 7                                           (D) 20 bit

                                           13                                              [P.T.O.
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56. The register AX is formed by               60. Which of the following should a
    grouping ....................... .
                                                   microcontroller at least consist of :
    (A) BH & BL
                                                   (A) CPU, ROM, I/O ports and
    (B) CH & CL
                                                        Timers
    (C) AH & AL
    (D) DH & DL                                    (B) RAM, ROM, I/O ports and
57. A 20-bit address bus allows access                  Timers
    to a memory of capacity :
                                                   (C) CPU, RAM, I/O ports and
    (A) 1 MB
                                                        Timers
    (B) 2 MB
    (C) 4 MB                                       (D) CPU, RAM, ROM, I/O ports and

    (D) 8 MB                                            Timers

58. What is the Address (SFR) for              61. A non-conducting sphere has
    TCON, SCON, SBUF, PCON and
                                                   uniform charge density in it. The
    PSW respectively ?
                                                   electric field at a point inside the
    (A) 88H, 98H, 99H, 87H, 0D0H
                                                   sphere will be .................
    (B) 98H, 99H, 87H, 88H, 0D0H
    (C) 0D0H, 87H, 88H, 99H, 98H                   (A) Zero

    (D) 87H, 88H, 0D0H, 98H, 99H                   (B) Only due to the charge inside
59. In 8051 which interrupt has highest                 that point
    priority ?
                                                   (C) Only due to the charge outside
    (A) IE1
    (B) TF0                                             that point

    (C) IE0                                        (D) Due to the entire charge of the
    (D) TF1                                             sphere

                                          14
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62. What happens to the current in a             65. Which component of the electric field
    coil while accelerating a magnet                 intensity is always continuous at the
    inside it ?                                      boundary ?

    (A) Increases                                    (A) Tangential
    (B) Decreases
                                                     (B) Normal
    (C) Remains constant
                                                     (C) Horizontal
    (D) Reverses
                                                     (D) Vertical
63. In an electromagnetic wave, the
    electric field of amplitude 6.2 V/m          66. Calculate the skin depth of a
    oscillates with a frequency of                   material with attenuation constant
    2.4 × 10 10 Hz. Estimate energy                  of 2 units.
    density of the wave :
                                                     (A) 2
    (     8.85 10 –12 C 2 / Nm 2 )
                                                     (B) 1
    (A) 1.4 × 10–10 J/m3
                                                     (C) 0.5
    (B) 2.4 × 10–10 J/m3
                                                     (D) 4
    (C) 3.4 × 10–10 J/m3

    (D) 4.4 × 10–10 J/m3                         67. The expression for velocity of a wave

64. The     ratio    of   conduction   to            in the conductor is :
    displacement current density is
                                                     (A) V         2 /
    referred to as :

    (A) Attenuation constant                         (B) V         2

    (B) Propagation constant
                                                     (C) V     2 /
    (C) Loss tangent
                                                     (D) V     2
    (D) Dielectric constant
                                            15                                     [P.T.O.
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68. The standing wave ratio of short               71. The phase shift keying is a
    circuited and open circuited lines will            modulation technique used for
    be :                                               transmitting :

    (A) 0                                              (A) digital    data   over    analog
    (B) 1                                                   channel

    (C) –1                                             (B) analog     data    over   digital

    (D)                                                     channel

69. In a good conductor the phase                      (C) binary signals only
    relation between the tangential
                                                       (D) FM signals
    components of electric E and the
                                                   72. A PLL maintains lock by comparing :
    magnetic field H is as follows :

    (A) E and H are in phase                           (A) The phase of two signals

    (B) E and H are out of phase                       (B) The frequency of two signals

    (C) H leads E by 90                                (C) The amplitude of two signals

    (D) E leads H by 45                                (D) The amplitude of input signal
70. Consider a transmission line of                         with a fixed threshold
    characteristic impedance 50 ohm.
                                                   73. To increase level of very weak radio
    Let it be terminated at one end by
                                                       signals from an antenna, you would
    + j50 ohm. The VSWR produced by                    use :
    it in the transmission line will be :
                                                       (A) an RF oscillator
    (A) 1
                                                       (B) an audio oscillator
    (B) 0
                                                       (C) an RF amplifier
    (C) Infinity

    (D) + j                                            (D) an audio amplifier

                                              16
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74. Which is the true statement about          76. Which is called as on-off keying ?
    frequency deviation in frequency               (A) Frequency shift keying
    modulation ?                                   (B) Uni-polar PAM

    (A) frequency        deviation   is            (C) Amplitude shift keying and

        proportional to carrier signal                 Uni-polar PAM

        frequency                                  (D) Phase shift keying

    (B) frequency        deviation   is        77. Which of the following technology
                                                   distributes the coverage of the cell
        proportional to amplitude of
                                                   and extends the cell boundary to
        carrier signal
                                                   hard-to-reach places ?
    (C) frequency        deviation   is
                                                   (A) Sectoring
        proportional to modulating
                                                   (B) Cell splitting
        frequency
                                                   (C) Micro cell zone concept
    (D) frequency        deviation   is
                                                   (D) Scattering
        proportional to amplitude of
                                               78. A planar LED is fabricated from
        modulating signal
                                                   GaAs is having a optical power
75. The equivalent noise temperature of            emitted, which is 0.018% of optical
    a network given the noise figure of            power generated internally which is

    the network or system is :                     0.6 P. Determine external power
                                                   efficiency :
    (A) T0 (F – 1)
                                                   (A) 0.18%
    (B) T0 (F + 1)
                                                   (B) 0.32%
    (C) T0 (F)                                     (C) 0.65%

    (D) T0/F                                       (D) 0.9%

                                          17                                     [P.T.O.
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79. A technique used for determining            81. The turn-off time of thyristor is

                                                     30 m sec at 50ºC. Its turn-off time
    the total fiber attenuation per unit
                                                     at 100º is :
    length is ................ method.

                                                     (A) same
    (A) Frank
                                                     (B) 15 m sec
    (B) Cut-off
                                                     (C) 60 m sec
    (C) Cut-back
                                                     (D) 100 m sec

    (D) OSA
                                                82. A six pulse thyristor rectifier bridge

80. Global Sensor Network is built for :             is connected to a balanced 50 Hz

                                                     three-phase ac source. Assuming
    (A) Reducing cost and time for
                                                     that the dc output current of the
         development
                                                     rectifier is constant, the lowest

    (B) Reducing cost and increasing                 harmonic component in the ac source

         time for development                        line current is :


    (C) Increasing cost and increasing               (A) 100 Hz


         time for development                        (B) 150 Hz


    (D) Increasing cost and decreasing               (C) 250 Hz


         time for development                        (D) 300 Hz

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83. In a thyristor dc chopper, which            85. In a dc motor, if the field coils get
    type of commutation results in best             opened, the speed of the motor will :
    performance ?
                                                    (A) decrease
    (A) current commutation

    (B) load commutation                            (B) come to a stop

    (C) voltage commutation                         (C) increase
    (D) supply commutation
                                                    (D) become zero
84. Consider the following statements :
                                                86. Voltage induced in the rotor of the
    The diodes in a voltage source
    inverter (McMurray Inverter) should             induction motor when it runs at

    be able to :                                    synchronous speed is :

    (1) Withstand a large voltage in
                                                    (A) very near input voltage to stator
        the reverse direction
                                                    (B) slip time the input voltage
    (2) Carry the commutating current
        excess of load current                      (C) zero
    (3) Provide the required reverse-
                                                    (D) very near input voltage to rotor
        bias to the outgoing thyristor

    (4) Feedback         the    reactive        87. Which of the following is an open

        current     to    the    source.            loop control system ?
        Of these statements :
                                                    (A) Field controlled D.C. motor
    (A) (1), (2) and (3) are correct
                                                    (B) Wardleonard control
    (B) (1), (3) and (4) are correct

    (C) (2), (3) and (4) are correct                (C) Metadyne

    (D) (1), (2) and (4) are correct                (D) Stroboscope

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88. Any externally introduced signal              91. Match List I with List II :

    affecting the controlled output is                                  List I

    called a :                                        (a) Sensors
                                                      (b) Networks
    (A) feedback
                                                      (c) Augmented intelligence
    (B) stimulus
                                                      (d) Standards
    (C) signal                                                       List II

    (D) gain control                                  (i)   Analytical tools that improve
                                                            the      ability       to    describe
89. For a type one system. the steady-
                                                            phenomenon
    state error due to step input is equal
                                                      (ii) Commonly accepted pres-
    to :                                                    criptions for action

    (A) Infinite                                      (iii) A device that generates an
                                                            electronic signal from a physical
    (B) Zero
                                                            condition
    (C) 0.25                                          (iv) A      mechanism             for   com-
                                                            municating           an     electronic
    (D) 0.5
                                                            signal
90. In a control system the output of the             Choose the correct answer from the
    controller is given to :                          options given below :
                                                            (a)   (b)     (c)    (d)
    (A) final control element
                                                      (A) (ii) (i)        (iii) (iv)
    (B) amplifier
                                                      (B) (iii) (iv) (ii) (i)
    (C) comparator                                    (C) (iii) (iv) (i)         (ii)

    (D) sensor                                        (D) (ii) (i)        (iv) (iii)

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92. Semiconductor strain gauges depend               95. What will be the ratio of amplitudes
     upon ................. for their action.            of largest (maximum) signal to
                                                         smallest (minimum) signal to which
     (A) Piezoelectric effect
                                                         the system is subjected ?
     (B) Piezo-resistive effect
                                                         (A) Time constant
     (C) Ferro-magnetic
                                                         (B) Settling period
     (D) Superconductivity
                                                         (C) Dynamic range
93. On applying mechanical stresses, a
                                                         (D) Bandwidth
     material gets electrically polarized.
     It must be a :                                  96. The sweep generator of a CRO is
                                                         used to produce :
     (A) Superconducting material
                                                         (A) sinusoidal voltage for the
     (B) Piezoelectric material
                                                              horizontal deflection of electron
     (C) Ferro-magnetic material
                                                              beam
     (D) Ferroelectric material
                                                         (B) sawtooth voltage for the vertical
94. ................ of a measuring system                    deflection of electron beam
     refers to its ability to follow instant
                                                         (C) sinusoidal voltage for the
     by instant the measured with time.
                                                              vertical deflection of electron
     (A) Bandwidth                                            beam

     (B) Fidelity                                        (D) sawtooth voltage for the

     (C) Measurement lag                                      horizontal deflection of electron
                                                              beam
     (D) Settling time


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97. Digital voltmeters can be used to
                                                    99. Needle        electrode          is    used   to
    measure ..................
                                                        measure .................................
    (A) voltage only

                                                        (A) EKG
    (B) voltage, temperature. pressure

         etc.
                                                        (B) EEG

    (C) voltage and current
                                                        (C) EOG
    (D) voltage and resistance

98. What is the relation between scale                  (D) EMG

    factor      and     sensitivity   of   a
                                                    100. Which rhythm is the principal
    transducer ?

                                                        component of the EEG that indicates
    (A) Scale factor is double of

         sensitivity                                    the alertness of the brain ?

    (B) Scale factor is inverse of
                                                        (A) Theta rhythm
         sensitivity

    (C) Sensitivity is inverse of scale                 (B) Gamma rhythm

         factor
                                                        (C) Beta rhythm
    (D) Sensitivity is equal to scale

         factor                                         (D) Alpha rhythm


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ROUGH WORK




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ROUGH WORK




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