Electronics and Communication Engineering - Analog Electronics

36. 

An ideal op-amp can amplify dc signals

A. True
B. False

Answer: Option A

Explanation:

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37. 

Consider the following statements :
The lower cut off frequencies of an RC coupled amplifier depend on

  1. input and output coupling capacitor
  2. emitter by pass capacitors
  3. junction capacitances
Which of the above are correct?

A. 1 only
B. 2 only
C. 1 and 2
D. 2 and 3

Answer: Option A

Explanation:

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38. 

Assertion (A): In a circuit using FET, gate is approximately at dc ground

Reason (R): Self bias stabilizes the quiescent operating point against changes in JFET parameters

A. Both A and R are correct and R is correct explanation for A
B. Both A and R are correct but R is not correct explanation for A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option B

Explanation:

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39. 

The Darlington pair consists of the following two stages

A. CE and CC
B. both CE
C. both CC
D. CE and CB

Answer: Option C

Explanation:

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40. 

Figure represents

A. Adder
B. Multiplier
C. Subtractor
D. Log Amplifier

Answer: Option C

Explanation:

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