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GATE 2017 Feedback Amplifier practice questions

1) When negative feedback is introduced in a voltage amplifier, the lower cut-off frequency

a) Changes by a factor AB
b) Decreases by a factor 1+AB
c) Increases by a factor 1+AB
d) Decreases by a factor A/(1+AB)


2) Negative feedback in voltage series Amplifier

a) Increases input impedance and decreases output impedance
b) Decreases input impedance and decreases output impedance
c) Decreases input impedance and increases output impedance
d) Increases input impedance and increases output impedance

3) Emitter follower is a

a) Current series feedback amplifier
b) Voltage series feedback amplifier
c) Current shunt feedback Amplifier
d) Voltage shunt feedback amplifier

4) Which of the following parameters won’t get affected by feedback?

a) Gain
b) Bandwidth
c) Gain Bandwidth product
d) None of these

5) Effect of feedback on output Offset voltage of an OPAMPS

a) Increases
b) decreases
c) Remains same
d) None of these

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