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Q.

Consider an n−p−n transistor amplifier in common emitter configuration. The current gain of the transistor is 100. If the collector current changes by1mA , what will be the change in emitter current?

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a

1.1mA

b

1.01mA

c

0.01mA

d

10mA

answer is B.

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Detailed Solution

βa.c=ΔICΔIB=ΔICΔIE−ΔIC Or 100=1ΔIE−1Or ΔIE−1=1/100=0.01Or ΔIE=1+0.01=1.01mA .

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Consider an n−p−n transistor amplifier in common emitter configuration. The current gain of the transistor is 100. If the collector current changes by1mA , what will be the change in emitter current?