A common-emitter transistor amplifier has a current gain of 50 . If the load resistance is 4 k Ω and input resistance is 500 Ω the voltage gain of the amplifier is

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Given β = 50 R L = 4 k Ω R i = 500 Ω V C E = I C R L V B E = I B R I We know that in Common Emitter Circuit- Current Gain β = I c I b = 50 And voltage gain A V = V c e V b e A V = I c I b × R L R i A V = 50 × 4 × 1000 500 = 400

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