Why the name Transistor ?

Ans: By forward biasing input junction (emitter-base junction) and reverse biasing output junction (collector-base junction), a low resistance of forward biased junction can be transformed into a high resistance of reverse biased junction.

Also by interchanging biases, a high resistance can be transformed into a low resistance. Hence the junction triode is called TRANsformer of reSISTOR, which in short becomes TRANSISTOR.

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