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Identify the condition for a transistor to act as an amplifier.

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in Physics – Class 12 by (135k points)
Identify the condition for a transistor to act as an amplifier.

(a) The emitter-base junction is forward biased and the base-collector junction is reverse biased

(b) No bias voltage is required

(c) Both junctions are forward biased

(d) Both junctions are reverse biased

I had been asked this question in examination.

Question is taken from Semiconductor Diode topic in division Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

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The correct choice is (a) The emitter-base junction is forward biased and the base-collector junction is reverse biased

Easiest explanation: In order to use a transistor as an amplifier the emitter-base junction is set up as forward biased and the base-collector junction is set up as reverse biased. This is the criteria for making a transistor function as an amplifier.

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