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Question: A transistor is operated in common emitter configuration at \(V_{C} = 2V.\) Such that a change in th...

A transistor is operated in common emitter configuration at VC=2V.V_{C} = 2V. Such that a change in the base current from 100 μA\mu A to 200 μ\muproduces a change in the collector current from 5 mA to 10 mA. The current gain is

A

100

B

150

C

75

D

50

Answer

50

Explanation

Solution

: current gain,

β=ΔICΔIB=(10−5)×10−3(200−100)×10−6=50\beta = \frac{\Delta I_{C}}{\Delta I_{B}} = \frac{(10 - 5) \times 10^{- 3}}{(200 - 100) \times 10^{- 6}} = 50