What mechanism does a circuit breaker utilize during electrical overloads?

A circuit breaker serves a vital role in electrical safety by automatically interrupting the flow of electricity during overloads. This action is typically achieved through various mechanisms, such as bimetallic strips that bend when heated by excessive current, or electromagnetic tripping devices that activate when the current exceeds a certain threshold. By cutting off the electrical flow, the circuit breaker protects wiring and connected devices from damage, preventing potential fires or other hazards associated with overload conditions. This automatic response helps maintain safe operating conditions within an electrical system.