Electronics and Communication Engineering - Analog Electronics

11. 

If three cascaded stages of amplifier have gains 10, 20 and 30 the overall voltage will be

A. 30
B. 60
C. 600
D. 6000

Answer: Option D

Explanation:

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12. 

A collector collects

A. electrons from the base in case of N-P-N transistor
B. electrons from the emitter in case P-N-P transistor
C. holes from the base in case of N-P-N transistor
D. holes from the base in case of P-N-P transistor

Answer: Option B

Explanation:

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13. 

In a resistance loaded, RC coupled amplifier the d.c. component is blocked by

A. Transistor
B. CC
C. RB
D. RC

Answer: Option B

Explanation:

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14. 

A logarithmic amplifier has diode in the feedback path.

A. True
B. False

Answer: Option A

Explanation:

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15. 

The input resistance of FET in the low frequency small signal operation is

A. infinitely high
B. around 1 kΩ
C. around 50 Ω
D. very small

Answer: Option A

Explanation:

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