For a transistor to work as an amplifier:

its emitter junction is in reverse bias and collector junction is in forward bias

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the transistor must have breakdown region

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its emitter junction is in forward bias and collector junction is in reverse bias

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its emitter and collector junction are in forward bias

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Solution

The correct option is A its emitter junction is in forward bias and collector junction is in reverse bias
Collector junction must be reversed biased and emitter junction must be forward biased to allow high collector current to flow which would result in gain.

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Similar questions

For transistor action, which of the following statements are correct:

(a) Base, emitter and collector regions should have similar size and doping concentrations.

(b) The base region must be very thin and lightly doped.

(d) Both the emitter junction as well as the collector junction are forward biased.

n - p - n

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