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Q.

In an NPN transistor circuit the collector current is 10mA. If 90% of the electrons are able to reach the collector from emitter          a. The emitter current will be 9mA               b. The emitter current will be 11mA          c The base current will be 1.1 mA                     d. The base current will be 0.1 mA

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a

b and d are correct

b

a and c are correct

c

a and d are correct

d

b and c are correct

answer is D.

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Detailed Solution

90% of emitter current is collector current  and 10 % will be base current 90% of IE is 10mA          IE=10×10090=11.1 mA   IB=1.1 mA
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