What is the purpose of a circuit breaker in electrical safety?

The purpose of a circuit breaker in electrical safety is primarily to reduce electrical hazards by automatically interrupting the flow of electricity in a circuit when an overload or short circuit occurs. This protective device is designed to detect fault conditions, which can lead to overheating, fires, or equipment damage. By disconnecting the circuit in these situations, a circuit breaker helps prevent potential hazards and ensures the safety of both electrical systems and individuals using electrical devices.

While other options may seem relevant—like enhancing circuit performance or monitoring voltage levels—these are not the primary functions of a circuit breaker. The crucial role it plays is in safeguarding against dangerous electrical conditions, making option B the correct answer.