A transistor has `alpha=0.90`, the emitter current is 15mA, what is (a) The collector current ? (b) The base current ? (c) Gain `beta` ?

A transistor has `alpha=0.90`, the emitter current is 15mA, what is (a

1.	A transistor has `alpha=0.90`, the emitter current is 15mA, what is (a) The collector current ? (b) The base current ? (c) Gain `beta` ?
Answer» Given `alpha=0.95 ` and `I_(E)=15mA` (a) as `alpha=(I_(C))/(-I_(E))` `rArr I_(C)=alphaI_(E)` `rArr I_(C)=0.95xx15` `rArr I_(C)=14.25 mA` (b) As `I_(E)=I_(B)+I_(C)` `rArr I_(B)=I_(E)-I_(C)` `rArr I_(B)=15-14.25` `rArr I_(B)=0.75 mA` (c) `beta=(alpha)/(1-alpha)` `rArr beta=0.90/(1-0.90)` `rArr =0.90/0.10` `rArr beta=9`

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A transistor has `alpha=0.90`, the emitter current is 15mA, what is (a) The collector current ? (b) The base current ? (c) Gain `beta` ?

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