Exercise: Analog Electronics

Questions for: Analog Electronics

Assertion (A): CE amplifier is the most widely used BJT amplifier

Reason (R): CE amplifier has zero phase difference between input and output

A:
Both A and R are correct and R is correct explanation for A
B:
Both A and R are correct but R is not correct explanation for A
C:
A is correct R is wrong
D:
A is wrong R is correct
Answer: C

There is 180° phase difference between input and output.

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The efficiency of a full wave rectifier using centre tapped transformer is twice that in full wave bridge rectifier.
A:
True
B:
False
C:
D:
Answer: B

Efficiency of full wave rectifier with centre tapped transformer is slightly higher than that of bridge rectifier.

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In the amplifier circuit of figure hfe = 100 and hie = 1000 ÎĐ. The voltage gain of amplifier is about
A:
0.33
B:
0.5
C:
0.66
D:
1
Answer: D

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The transistor of following figure in Si diode with a base current of 40 ΞA and ICBO = 0, if VBB = 6V, RE = 2 kÎĐ and Îē = 90, IBQ = 20 ΞA then RB =
A:
200 kÎĐ
B:
265 kÎĐ
C:
150 kÎĐ
D:
100 kÎĐ
Answer: B

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An amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly a
A:
sine wave
B:
square wave
C:
triangular wave
D:
(a) or (c)
Answer: B

When a sinusoidal voltage is clipped on both sides it resembles a square wave.

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