Current gain - AC in common emitter mode of transistor isA- - AC - I C - I B - V C - constantB- - AC - I B - I C - V C - constantC- - AC - I C - I E - V C - constantD- - AC - I E - I C - V C - constant

The correct option is A It is β_AC = I_C/ I_B, V_C = constant Collector voltage is to be kept a constant. ...

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Transistor as an Amplifier

Current gain ...

Question

Current gain $β_{A C}$ in common emitter mode of transistor is

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β_{A C}

α = \frac{Δ I_{C}}{Δ I_{E}}

α

β

α = δ I_{C} / δ I_{E}

β = δ I_{C} / δ I_{B}

α

β

A_{v} = \frac{- β_{a c} R_{L}}{r_{i}}

β_{a c}

R_{L}

r_{i}

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