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Question

Transistor is a:

A
current-controlled current device
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B
current-controlled voltage device
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C
voltage-controlled current device
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D
voltage-controlled voltage device
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Solution

The correct option is A current-controlled current device
This is because emitter current i.e. (flow of carrier from emitter) determines the collector current (the carrier reaching the collector). The continuous flow of carriers from the emitter to the collector through base takes place in a transistor, i.e, IE=IB+IC.
So, transistor is a current controlled device.

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