Question

An electric is used to switch on and switch
off electric devices.​

Answer 1

Answer:

A switch is an electric device that is used to break a circuit. When the switch is in 'OFF' position, then the circuit is not complete. Then, the circuit is called an open circuit. An electric current cannot flow through this circuit.

Explanation:

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Answer 2

Answer:

An electric switch is a device used to either break an electric circuit  or to complete it.

When the switch is ‘on’ there is no gap in the circuit and the circuit is  complete and current flows in the circuit. When the switch is ‘off’ there  is gap in the circuit and current does not flow in the circuit.