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

The purpose of a circuit breaker is to automatically interrupt current flow in the case of an overload or short circuit. This device is designed as a safety mechanism that protects electrical circuits from damage caused by excessive current or faults. When current exceeds a predetermined level, which may indicate an issue such as a short circuit or an overload condition (where too many devices are drawing power), the circuit breaker trips and cuts off power to the affected circuit. This protection helps prevent overheating of wires, potential electrical fires, and damage to appliances and equipment.

The other options do not align with the primary function of a circuit breaker. Enhancing or amplifying current flow and regulating frequency pertain to different aspects of electrical systems that do not involve safety mechanisms intended to interrupt current flow.