How does a circuit breaker differ from a fuse?

A circuit breaker is a device that interrupts the flow of electricity when there is an overload or a short circuit, and it can be easily reset once the issue causing the interruption is resolved. This ensures that the circuit can be restored without requiring any replacement of parts. In contrast, a fuse is designed to melt when too much current flows, effectively breaking the circuit and preventing damage. Once a fuse fails, it must be replaced entirely rather than simply reset.

The key difference highlighted in the correct choice is that a circuit breaker can be reset after it "pops," which allows for convenience and efficiency in electrical systems. Comparatively, a fuse represents a one-time-use solution once it has blown, necessitating a new fuse to restore functionality in the circuit. This characteristic of circuit breakers makes them more user-friendly and reduces downtime since they do not require the replacement of physical components after they trip.