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In a common emitter transistor, a change of 40 μA in base current produces a change of 5 mA in collector current. If the resistance in collector circuit is 2 kΩ and that in the base circuit is 500 Ω, find the voltage gain .

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a

80

b

150

c

250

d

500

answer is D.

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Detailed Solution

β=∆IC∆IB=5 x 10-340 x 10-6=125∴Av=125 x 20.5=500

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In a common emitter transistor, a change of 40 μA in base current produces a change of 5 mA in collector current. If the resistance in collector circuit is 2 kΩ and that in the base circuit is 500 Ω, find the voltage gain .