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  4. A transistor is used in common emitter mode as an amplifier. Then: (1) the base-emitter junction is forward biased (2) the base-emitter junction is reverse biased (3) the input signal is connected in series with the voltage applied to bias the base-collector junction (4) the input signal is connected in series with the voltage applied to the base-emitter junction

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Q. A transistor is used in common emitter mode as an amplifier. Then :
(1) the base-emitter junction is forward biased
(2) the base-emitter junction is reverse biased
(3) the input signal is connected in series with the voltage applied to bias the base-collector junction
(4) the input signal is connected in series with the voltage applied to the base-emitter junction

BHUBHU 2006

Solution:

While using a transistor as a common-emitter amplifier, the emitter-base junction is forward biased and the signal to be amplified is connected in emitter-base junction.