A transistor is used in common emitter c...

A transistor is used in common emitter configuration. Given its `alpha=0.9`, calculate the change in collector current when the base current changes by `2muA`.

`3 muA`

`9 muA`

`18 muA`

`30 muA`

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The correct Answer is:

`beta=alpha/(1-alpha) = 0.9/(1-0.9) = 9 " " beta=(DeltaI_C)/(DeltaI_B)`
`therefore DeltaI_C=beta. DeltaI_B " " therefore DeltaI_C=9xx2=18 muA`

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