Question

a device that is used to put a circuit off and on
one word answer​

Answer 1

Answer:

Hope it helps you

Explanation:

A 'switch' is an electric device that is used to make or break a circuit. When the switch is in 'OFF' position, then the circuit is not complete. Then, the circuit is called an Open circuit.

Answer 2

Answer:

It's called as Switch

Explanation:

It is used to break or connect a circuit

It's helps to reduce the continuous flow of charge