Question

What do you understand by a closed circuit and an open circuit​

Answer 1

An open circuit is one where the continuity has been broken by an interruption in the path for current to flow. A closed circuit is one that is complete, with good continuity throughout. A device designed to open or close a circuit under controlled conditions is called a switch.

Answer 2

Answer:

Closed circuit :-

A circuit without interruption, providing continuous path through which a current can flow.

Open circuit :-

A circuit where continuity is broken by an interruption in path for current to flow.

I hope this will help you : )