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Physics Question on Semiconductor electronics: materials, devices and simple circuits

A transistor is operated in common emitter configuration at VC=2 VV_C = 2 \,V. Such that a change in the base current from 100 μA100\, \mu A to 200 μA200\, \mu A produces a change in the collector current from 5 mA5\, mA to 10 mA10 \,mA. The current gain is

A

100100

B

150150

C

7575

D

5050

Answer

5050

Explanation

Solution

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