Electronics and Communication Engineering - Analog Electronics

16. 

In a tuned class C power amplifier the quiescent value of collector to emitter voltage is equal to (VCC denotes collector battery voltage)

A. VCC
B. 0.5 VCC
C. 0.25 VCC
D. either (b) or (c)

Answer: Option A

Explanation:

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17. 

Volt equivalent temperature in a PN Junction diode is

A.
B.
C.
D. 11600 T

Answer: Option A

Explanation:

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18. 

Primary advantage of a crystal oscillator is that

A. it can oscillate at any frequency
B. it gives a high O/P voltage
C. its frequency of oscillation remains almost constant
D. it operates on a very low dc supply voltage

Answer: Option C

Explanation:

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19. 

The conversion or collector circuit efficiency is a measure

A. how successfully the active device converts D.C. power to A.C. signal power
B. how much distortion in output is reduced with respect to input
C. how successfully the active device converts A.C. power to D.C. signal power
D. none of the above

Answer: Option A

Explanation:

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20. 

A transistor amplifier is operating in class A mode. If a transformer is connected for impedance matching, the efficiency will

A. increase
B. decrease
C. not be affected
D. increase or decrease

Answer: Option A

Explanation:

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