What is the role of circuit breakers in an electrical system?

Circuit breakers play a crucial role in electrical systems by protecting circuits from overload and short circuits. When electrical current exceeds the safe limit due to an overload (when too many devices draw power simultaneously) or a short circuit (when a fault creates a low-resistance path), the circuit breaker automatically interrupts the flow of electricity. This prevents overheating, potential damage to wiring and appliances, and reduces the risk of electrical fires.

In their functioning, circuit breakers act like safety valves. When they detect unsafe conditions, they trip or break the circuit, stopping electricity from flowing. This ability to quickly respond to dangerous situations not only protects the electrical infrastructure but also ensures the safety of individuals using the electrical system.

Other options do not correctly reflect the primary purpose of circuit breakers. They do not assist in generating electricity, nor do they increase current flow, as that would counteract their protective role. Additionally, while they may indicate whether a circuit has been interrupted, circuit breakers do not measure electrical consumption directly; that function is performed by ammeters or other measuring devices.