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Question 20240
JEE Physics · Medium

Semiconductors: Transistor — Configurations MCQ

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Transistor — ConfigurationsMediumQuestion 20240

Question

Which BJT configuration provides both current gain and voltage gain?
  1. A
    Common Base
  2. B
    Common Emitter
    Correct
  3. C
    Common Collector
  4. D
    All configurations equally

Correct answer

Common Emitter

Explanation

CE: voltage gain Av > 1, current gain β > 1, power gain = Av × AI (highest). CB: voltage gain > 1 but current gain (α) < 1. CC (emitter follower): current gain > 1 but voltage gain < 1. CE is used in most amplifiers.

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