Discussion
Match List-I with List-II and select the correct answer from the codes given below :
| List I | List II |
|---|---|
| (a) Wein bridge oscillator | (i) RF range |
| (b) Voltage shunt feedback amplifier | (ii) AF range |
| (c) Crystal oscillator | (iii) Low output impedance |
| (d) Current shunt feedback amplifier | (iv) High output impedance |
| (v) Low input impedance |
Answer: B
The correct code is (a)-(ii), (b)-(iii), (c)-(i), (d)-(v).
A Wien bridge oscillator is an RC oscillator used in the audio frequency range (ii). Voltage shunt feedback samples the output voltage, which lowers the output impedance (iii). A crystal oscillator gives very stable frequencies in the radio frequency range (i). Current shunt feedback mixes the feedback in shunt at the input, which lowers the input impedance (v).
The other codes swap these: a Wien bridge is not an RF circuit, and a crystal oscillator is not an AF circuit, so any code pairing them that way is wrong.
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