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In the case of a common emitter transistor amplifier, the ratio of the collector current to the emitter current Ic/Ie is 0.96. The current gain of the amplifier is

1. 6
2. 48
3. 24
4. 12

Correct answer: 12

Solution

The current gain (β) of a common emitter transistor is given by β = Ic/Ib, where Ib = Ie - Ic. Using Ic/Ie = 0.96, we find Ib = 0.04Ie. Substituting, β = Ic/Ib = 0.96Ie / 0.04Ie = 24. Thus, the current gain is 24.

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