Describe the function of a circuit breaker.

A circuit breaker is a crucial safety device designed to protect electrical circuits from damage caused by overloads or faults. Its primary function is to interrupt the flow of electricity when excessive current is detected. This interruption prevents overheating and potential hazards such as electrical fires or equipment damage.

When a circuit experiences an overload—where the current surpasses the rated capacity of the circuit—the circuit breaker automatically opens the circuit, cutting off the flow of electricity. This action ensures that the system remains safe and that no further damage occurs due to the high current.

In addition, circuit breakers can also trip in response to short circuits, where the current takes an unintended path, which can pose severe risks. By breaking the circuit in these situations, circuit breakers help maintain the overall integrity of the electrical system.

Given this critical function of interrupting electrical flow during abnormal conditions, it’s clear why this is the correct answer, emphasizing the importance of circuit breakers in maintaining safe electrical environments.