Electronics and Communication Engineering - Analog Electronics

36. 

How many cascaded stage of CE amplifiers will result in polarity inversion of the input signal?

A. Two
B. Three
C. Four
D. None

Answer: Option B

Explanation:

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37. 

Circuit shown in the figure is

A. astable multivibrator
B. monostable multivibrator
C. VCO
D. ramp Generator

Answer: Option A

Explanation:

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38. 

The gain of a source follower is unity.

A. True
B. False

Answer: Option A

Explanation:

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39. 

In a transistor, current ICBO flow when

A. some D.C. voltage is applied in the reverse direction to the emitter junction with the collector open circuit
B. some D.C. voltage is applied in the forward direction to the collector junction with the emitter open circuit
C. some D.C. voltage is applied in the reverse direction to the collector junction with the emitter open circuited
D. some D.C. voltage is applied in the forward direction to the emitter junction with the collector open circuited

Answer: Option C

Explanation:

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40. 

The D.C. alpha(a) of a transistor is approximately

A. unity
B. 10 to 50
C. 100 to 500
D. 1000 to 5000

Answer: Option A

Explanation:

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