What is the function of a circuit breaker in an electrical system?

The function of a circuit breaker in an electrical system is to protect against overcurrent. When the electric current flowing through the circuit exceeds a predetermined level, which can happen due to short circuits, overload conditions, or faults, the circuit breaker automatically interrupts the flow of electricity. This action helps to prevent potential hazards such as electrical fires, equipment damage, and other safety risks associated with excessive current.

By tripping and breaking the circuit, it ensures that any wiring and connected devices do not suffer from the adverse effects of overcurrent. This safety mechanism is essential for maintaining the integrity of the electrical system while also protecting users and reducing the risk of accidents.

Other choices like increasing electrical supply, storing electrical energy, or providing lighting do not align with the primary role of a circuit breaker, as its main purpose is focused on safeguarding the electrical infrastructure rather than facilitating power supply or usage.