Question

explain the working of transistor as switch

Answer 1

Transistors may be used as switchingelements to control DC power to a load. The switched (controlled) current goes between emitter and collector; the controlling current goes between emitter and base. When atransistor has zero current through it, it is said to be in a state of cutoff (fully nonconducting).

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Answer 2

Transistors may be used as switching elements to control DC power to a load. The switched (controlled) current goes between emitter and collector; the controlling current goes between emitter and base. When a transistor has zero current through it, it is said to be in a state of cutoff (fully nonconducting).