The differences are —
| Closed circuit | Open circuit |
|---|---|
| Current flows only in a closed circuit | Current does not flow in an open circuit. |
| For an electric circuit to be closed, each component of it must pass current through it, i.e., it should be conducting | If there is an insulator in the path (or the circuit is broken), the circuit is incomplete (or open) and the current will not flow through it. |
The diagram below shows closed and open circuits:
