Electronics and Communication Engineering - Analog Electronics

41. 

Which of the amplifier circuits using junction transistors has the best gain?

A. Common emitter
B. Common base
C. Common collector
D. All above has the same gain

Answer: Option A

Explanation:

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42. 

To obtain very high input and O/P impedance in a feedback amplifier, the type of feedback utilized

A. voltage series
B. current series
C. voltage shunt
D. current shunt

Answer: Option B

Explanation:

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43. 

The thermal resistance of a BJT is about

A. 100° C/W
B. 200° C/W
C. 20° C/W
D. 2° C/W

Answer: Option B

Explanation:

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44. 

Oscillator with best frequency stability is

A. Crystal oscillator
B. Phase shift oscillator
C. Clapp oscillator
D. Hartley oscillator

Answer: Option A

Explanation:

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45. 

The IF amplifier in a superheterodyne receiver is

A. single-stage single-timed amplifier
B. two stage of single tuned amplifier
C. double tuned amplifier
D. class-C amplifier

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.