Question

In an n-p-n transistor circuit, the collector current is 20 mA. If 90 % of electron emitted reach the collector :-
A. the emitter current will be 18 mA
B. emitter current will be 22 mA
C. base current will be 2mA
D. base current will be 1mA

Answer 1

Correct Answer - B::C
`I_(C)=90%I_(E)rArrI_(E)=(100)/(90)xxI_(C)=(100)/(90)xx20=22mA`
`I_(B)=I_(E)=I_(C)=22-20=2mA`