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Amplifiers with Negative Feedback MCQs

Free 19+ Amplifiers with Negative Feedback MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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Amplifiers with Negative Feedback — MCQs for Pakistan government job tests

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Amplifiers with Negative Feedback

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1.How does applying negative voltage feedback to an amplifier affect its input impedance?

2.What is the primary application of an emitter follower circuit?

3.How does applying negative voltage feedback affect the bandwidth of an amplifier?

4.An emitter follower circuit is classified as which type of feedback circuit?

5.What type of input impedance does an emitter follower exhibit?

6.How does applying negative voltage feedback to an amplifier affect its output impedance?

7.What is the typical voltage gain of an emitter follower configuration?

8.What is the primary application of an emitter follower circuit?

9.An amplifier has an open-loop gain of 100 dB. If a negative feedback reduces the gain by 3 dB, what will be the new gain of the amplifier?

10.What happens to the output impedance of an amplifier when negative current feedback is introduced?

11.In which of the following devices is negative feedback commonly used?

12.Which type of network is commonly used in a feedback circuit?

13.What happens to the input impedance of an amplifier when negative current feedback is implemented?

14.An amplifier has a feedback fraction of 0.01. What is the approximate voltage gain when negative feedback is applied?

15.What is the term used for the gain of an amplifier when feedback is applied?

16.An amplifier produces an output voltage of 10 V, and 100 mV of this output is returned to the input as feedback. What is the value of the feedback fraction?

17.What is the typical range for the value of the negative feedback fraction?

18.What effect does applying negative voltage feedback have on an amplifier's voltage gain?

19.What is the characteristic output impedance of an emitter follower circuit?

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