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 `200 muA` produces a change in the collector current from `5 mA` to `10 mA`. The current gain is

Options

A. 75
B. 100
C. 150
D. 50

Answer

D

Explanation

For a transistor `I_(E)=I_(B)+I+I_(C)`
`I_(B)=` base current
`I_(C)=` collector current
and current gain `beta=(DeltaI_(C))/(DeltaI_(B))`
`DeltaI_(C)=5xx10^(-3)A`
`DeltaI_(B)=100xx10^(-6)A`
`beta=(5)/(100)xx1000=50`