In terms of electrical safety, what is the function of a circuit breaker?

A circuit breaker serves a crucial role in electrical safety primarily by preventing overloads and short circuits. When the electrical current exceeds a set threshold due to a fault condition, such as a short circuit or an overload caused by too many devices drawing power simultaneously, the circuit breaker automatically interrupts the flow of electricity. This action helps protect electrical circuits and devices from damage and minimizes the risk of fire hazards that can arise from excessive electrical flow.

The ability to reset the circuit breaker after it trips adds to its usefulness, allowing it to be reused without replacement after the issue has been resolved. This function is essential for maintaining a safe electrical system, as it helps ensure that electrical components are not subjected to conditions that can lead to their failure or pose safety risks.

The other options, while related to electrical concepts, do not accurately describe the primary safety function of a circuit breaker. Specifically, these options do not address the concept of circuit protection, which is central to the operation of a circuit breaker.