A P-N transistor is used in common - emitter mode in an amplifier circuit. A change of 40μA in the base current brings a change of 2mA in collector current and 0.04V in base -emitter voltage, Find (i) input resistance (ii) current amplification factor β. If a load resistance of 6 k oh m is used, then find voltage gain?
Asked by Topperlearning User | 10th Jul, 2014, 10:25: AM
ΔIB = 40μA 40 x 10-6 A
ΔIC = 2mA = 2 x 10-3A
RL = 6kΩ = 6 x 103Ω
(i) Rin =
(ii) β =
voltage - gain = β
Answered by | 10th Jul, 2014, 12:25: PM
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