Which device is designed to protect electrical circuits by breaking the circuit when overload occurs?

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Multiple Choice

Which device is designed to protect electrical circuits by breaking the circuit when overload occurs?

Explanation:
A device that protects electrical circuits by breaking the circuit when overload occurs is a circuit breaker (often coordinated with protective relays). When current exceeds a safe level, the breaker trips automatically, opening the circuit to prevent damage. It can be reset after the fault is cleared, which is why it’s preferred over a fuse, which also interrupts current but requires replacement after a fault and doesn’t offer easy fault indication. Switches simply control power manually and don’t automatically respond to overload, while diodes are not protective devices in this sense.

A device that protects electrical circuits by breaking the circuit when overload occurs is a circuit breaker (often coordinated with protective relays). When current exceeds a safe level, the breaker trips automatically, opening the circuit to prevent damage. It can be reset after the fault is cleared, which is why it’s preferred over a fuse, which also interrupts current but requires replacement after a fault and doesn’t offer easy fault indication. Switches simply control power manually and don’t automatically respond to overload, while diodes are not protective devices in this sense.

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