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In a transistor amplifier, when signal voltage changes by 0.01 volt, the base current changes by 10μA and collector current changes by 1 mA. If the collector resistance RC=4KΩ and load resistance RL=8kΩ , than the current gain is:

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a

1

b

10

c

100

d

1000

answer is C.

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Detailed Solution

Given that ΔIB=10μA,ΔIC=1mA ΔVBE=0.01V (the transistor is used I common-emitter configuration)RC=4kΩ and RL=8kΩ Current gain β=ΔICΔIB=1mA10μA=100

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In a transistor amplifier, when signal voltage changes by 0.01 volt, the base current changes by 10μA and collector current changes by 1 mA. If the collector resistance RC=4KΩ and load resistance RL=8kΩ , than the current gain is: