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A transistor is operated in common emitt...

A transistor is operated in common emitter configuration at `V_(c)=2 V` such that a change in the base current from `100 muA` to `300 muA` produces a change in the collector current from `10 mA` to `20 mA`. The current gain is

A

50

B

75

C

100

D

25

Text Solution

Verified by Experts

The correct Answer is:
A
Current gain, `beta=(DeltaI_(C ))/(DeltaI_(B))`
`=((20-10)mA)/((300-100)muA)=(10xx10^(-3)A)/(200xx10^(-6)A)=50`
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