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To use a transistor as an amplifier

1. the emitter base junction is forward biased and the base collector junction is reverse biased
2. no bias voltage is required
3. both junctions are forward biased
4. both junctions are reverse biased

Correct answer: the emitter base junction is forward biased and the base collector junction is reverse biased

Solution

For a transistor to function as an amplifier, the emitter-base junction must be forward biased to allow current flow, while the base-collector junction must be reverse biased to maintain control over the output current.

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