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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 biasedI 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

Answer»

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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