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Q.

The input resistance of a silicon transistor is 100Ω . Base current is changed by 40μA which results in a change in collector current by 2mA. This transistor is used as a common emitter amplifier with a load resistance of 4KΩ . The voltage gain of the amplifier is

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a

2000

b

1000

c

4000

d

3000

answer is A.

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Detailed Solution

β=ΔICΔIB=2.10−340.10−6=50 Voltage gain =β(RLRi)=504000100=2000
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