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Q.

In an NPN transistor, 1010 electrons enter the emitter in 10−6 sec. If 2% electrons are lost in the base, calculate the current transfer ratio.

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a

0.98

b

0.02

c

0.2

d

1.2

answer is A.

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Detailed Solution

If 2% electrons are lost in base, then 98% goes to collector. Hence, IC=98% of IE = 0.98× IE ∴Current transfer ratio =ICIE=0.98
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