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Bipolar Junction Transistors (BJT) - Technical MCQs

Q1:

An emitter-follower has a voltage gain that is __________.

A much less than one

B approximately equal to one

C greater than one

D zero

ANS:B - approximately equal to one

A common-collector configuration is technically a pure current amplifier (current gain only).

For this to be achieved, the voltage gain must be unity, lest it would function like a common-emitter.

Hence, the answer B. Approximately equal to 1.