For a transistor in CE mode to be used as an amplifier, it must be operated in: (a) Both cut-off and Saturation (b) Saturation region only (c) Cut-off region only (d) The active region only

Answer: (d). Cut-off and saturation are used for switching (OFF/ON). Linear amplification needs IC = β IB, which holds only in the active region. So the answer is (d).

For a transistor in CE mode to be used as an amplifier, it must be… | JEE Main 2021 (27 Aug, Shift 1)

Q67JEE Main 2021 · 27 AUG · SHIFT 1Easy

Junction Transistor

For a transistor in CE mode to be used as an amplifier, it must be operated in:

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Answer: (d)

Cut-off and saturation are used for switching (OFF/ON).
Linear amplification needs $I_C = \beta I_B$ , which holds only in the active region.
So the answer is (d).

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