Negative Feedback Amplifiers - Electronic Engineering (MCQ) questions & answers

1)   What are the consequences over the non-linear distortion by the inception of negative feedback?

a. Level of non-linear distortion goes on increasing
b. Level of non-linear distortion goes on decreasing
c. Level of non-linear distortion undergoes stability
d. None of the above
Answer  Explanation 

ANSWER: Level of non-linear distortion goes on decreasing

Explanation:
No explanation is available for this question!
2)   Stability of a transfer gain is generally defined as the reciprocal of _______

a. Resistivity
b. Conductivity
c. Sensitivity
d. Desensitivity
Answer  Explanation 

ANSWER: Sensitivity

Explanation:
No explanation is available for this question!
3)   What would happen, if the signal Xd  passes through the feedback network?

a. Xd will get multiplied by 'A'
b. Xd will get multiplied by 'β'
c. Xd will get multiplied by '1 – Aβ'
d. Xd will get multiplied by '1 + Aβ'
Answer  Explanation 

ANSWER: Xd will get multiplied by 'β'

Explanation:
No explanation is available for this question!
4)   After passing through which circuit/network ,does the signal Xd (output signal obtained by taking the difference of two input signals) get multiplied by '-1'?

a. Amplifier circuit
b. Feedback network
c. Mixing network
d. Sampling network
Answer  Explanation 

ANSWER: Mixing network

Explanation:
No explanation is available for this question!
5)   What would be the computational value of feedback voltage in a negative feedback amplifier with A = 100, β = 0.03 and input signal voltage = 30 mV?

a. 0.03 V
b. 0.06 V
c. 0.09 V
d. 0.15 V
Answer  Explanation 

ANSWER: 0.09 V

Explanation:
No explanation is available for this question!
6)   Which among the following is an output provided by transresistance amplifier?

a. Output current proportional to signal voltage
b. Output voltage proportional to signal current
c. Output voltage proportional to input voltage
d. Output current proportional to signal current
Answer  Explanation 

ANSWER: Output voltage proportional to signal current

Explanation:
No explanation is available for this question!
7)   Which among the below specified conditions is responsible to drive a low resistance load by the current amplifier circuit?

a. Rs >> Ri
b. R0 >> RL
c. Rs << Ri
d. R0 << RL
Answer  Explanation 

ANSWER: R0 >> RL

Explanation:
No explanation is available for this question!
8)   What should be the value of input resistance for an ideal voltage amplifier circuit?

a. Zero
b. Unity
c. Infinity
d. Unpredictable
Answer  Explanation 

ANSWER: Infinity

Explanation:
No explanation is available for this question!
9)   Which among the following parameter/s increase/s due to positive feedback?

A. Input voltage
B. Output Voltage
C. Noise
D. Voltage Gain

a. A & B
b. Only C
c. B & D
d. A, B, C & D
Answer  Explanation 

ANSWER: A, B, C & D

Explanation:
No explanation is available for this question!

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