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# CBSE Class 12-science Answered

Draw a circuit diagram for use of NPN transistor as an amplifier in common emitter configuration. The input resistance of a transistor is 1000 Ω. On changing its base current bv 10 uA. the collector current increases bv 2  mA. If a load resistance of 5 k Ω is used in the circuit, calculate: (i) The current gain (ii) Voltage gain of the amplifier
Asked by Topperlearning User | 10 Jul, 2014, 02:24: PM

Numerical: Given

Rin = 1000 Ω

Δ IB = 10 μA = 10-5 A

ΔIC = 2mA = 2 x 10-3A

Rout = 5 kΩ = 5 x 103 Ω

(i) Current gain

(ii) Voltage gain

Answered by | 10 Jul, 2014, 04:24: PM

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