Exercise: Analog Electronics

Questions for: Analog Electronics

The main advantage of a crystal oscillator
A:
can oscillate any frequency
B:
gives a high output voltage
C:
frequency of oscillation is almost constant
D:
can operates at a low dc voltage
Answer: C

Crystal oscillator has the advantage of frequency stability.

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In figure, V0 =
A:
-1 V
B:
2 V
C:
+1 V
D:
+15 V
Answer: B

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The most widely used diode rectifier circuit is
A:
half wave
B:
full wave with centre tapped transformer
C:
bridge
D:
either (a) or (b)
Answer: C

Bridge rectifier has the advantage of lower PIV. Moreover it does not require centre tapped transformer.

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The input to integrating op-amp is a rectangular wave. The output will be
A:
a sine wave
B:
a rectangular wave
C:
a triangular wave
D:
none of the above
Answer: C

Integral of constant is t.

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In the circuit of figure diode will conduct
A:
from 90 to 180° in the positive half cycle
B:
from 30° to 180° in the positive half cycle
C:
from 50° to 160° in the positive half cycle
D:
from 30° to 150° in the positive half cycle
Answer: D

Diode will conduct when instantaneous value of ac voltage is more than 50 V.

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