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 | 10th Jul, 2014, 02:24: PM

Expert Answer:

 

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

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(ii) Voltage gain

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