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in Physics by (91.3k points)
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In an n-p-n circuit transistor, the collector current is 10 mA. If 80% electrons emitted reach the collector, then
A. the emitter current will be 7.5 mA
B. the emitter current will be 12.5 mA
C. the base current will be 3.5 mA
D. the base current will be 1.5 mA

1 Answer

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Best answer
Correct Answer - B
Here, `I_C`=80% of `I_E=80/100I_E`
or `I_E=I_C/0.8=10/0.8=12.5 mA`
`I_B=I_E-IC=12.5-10=2.5 mA`

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