Explore topic-wise MCQs in Analog Circuits.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

Consider the total harmonic distortion of a closed loop system is 5%. Distortion without feedback is 10%. Calculate the sensitivity of closed loop system.

A. 0.5
B. 0.2
C. 0.6
D. 0.1
Answer» B. 0.2
Discussion
2.

Circuit P has desensitivity 20, circuit Q has sensitivity 0.1 and circuit R has desensitivity 40. Which of the following is more stable in gain?

A. Circuit P
B. Circuit Q
C. Circuit R
D. All circuits are equally stable in gain
Answer» D. All circuits are equally stable in gain
Discussion
3.

Relative change of gain of feedback amplifier is 0.05. Also, loop gain is 9. Find desensitivity?

A. 50
B. 10
C. 20
D. 1/9
Answer» C. 20
Discussion
4.

Find the relative change in gain with negative feedback given that return ratio is 24, and feedback factor is 3, when the change in open loop gain is 2.

A. 1
B. 1.6
C. 0.1
D. 0.01
Answer» E.
Discussion
5.

Consider an open loop circuit with lower cutoff frequency 5kHz and upper cutoff frequency 20kHz. If negative feedback is applied to the same, choose correct option stating the new cutoff frequencies.

A. Lower cutoff = 5kHz, Upper cutoff = 20kHz
B. Lower cutoff = 2kHz, Upper cutoff = 18kHz
C. Lower cutoff = 2kHz, Upper cutoff = 25kHz
D. Lower cutoff = 10kHz, Upper cutoff = 25kHz
Answer» D. Lower cutoff = 10kHz, Upper cutoff = 25kHz
Discussion
6.

Return ratio for a circuit is 220. What is the amount of feedback, correct up to 2 decimal places?

A. 2.34 dB
B. 46.84 dB
C. 46.88 dB
D. 46.88 dB
Answer» D. 46.88 dB
Discussion
7.

What is the reverse transmission factor?

A. Ratio of output by input signal
B. Ratio of feedback by input signal
C. Ration of feedback by output signal
D. Ratio of input by feedback signal
Answer» D. Ratio of input by feedback signal
Discussion