How does a circuit breaker differ from a fuse?

• A. A circuit breaker can be replaced, but a fuse cannot
• B. A circuit breaker must be reset, while a fuse can be reused
• C. A circuit breaker can be reset after tripping, but a fuse needs replacement
• D. A circuit breaker operates at lower currents than a fuse

Answer: (C)

A circuit breaker is designed to interrupt the flow of electricity in a circuit when it detects an overload or a short circuit, effectively acting as a safety device. One of its key features is the ability to reset after it has tripped. This means that once the issue that caused the circuit breaker to trip is resolved, the breaker can simply be reset to restore power without any need for replacement.

In contrast, a fuse serves a similar protective function but operates differently. When a fuse experiences an overload, it melts its internal element to break the circuit. This action permanently disables the fuse, requiring it to be replaced after it has blown.

The ability to reset a circuit breaker after tripping, combined with its reusable nature, makes it a more convenient and often preferred option in modern electrical systems compared to fuses, which must be replaced once they have activated. This difference in operation and maintenance is fundamental when comparing these two protective devices.