Exercise: Analog Electronics

Questions for: Analog Electronics

Which one of the following power amplifier has the maximum efficiency?
A:
Class A
B:
Class B
C:
Class AB
D:
Class C
Answer: D
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In figure, VC is approximately equal to
A:
2 V
B:
4.6 V
C:
8 V
D:
7.6 V
Answer: C
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In a CE transistor amplifier, when collector-emitter voltage increases
A:
the instantaneous operating point moves up the load line
B:
the instantaneous operating point moves down the line
C:
load current increases
D:
none of the above
Answer: A
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For a transistor the normal collector voltage is 12 V. If actually it is found to be + 28 V, the trouble could be
A:
RL is open
B:
RE is open
C:
CE is shorted
D:
CE is open
Answer: B
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In an inverting amplifier using op-amp the current input to the inverting terminal
A:
is equal to the current through feedback resistance
B:
is less than the current through feedback resistance
C:
is more than the current through feedback resistance
D:
may be equal to, less or more than current through feedback resistance
Answer: A
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