What is typically used to limit the amount of current flowing in a circuit?

Circuit breakers and fuses are both devices designed to limit the amount of current flowing in a circuit, thereby preventing excessive currents that can lead to overheating or damage to electrical components.

A circuit breaker serves as an automatic switch that interrupts the flow of electricity when it detects a fault or overload in the circuit. It can be reset after tripping, which makes it a reusable option for circuit protection.

Similarly, a fuse contains a thin wire that melts when the current exceeds a certain threshold, breaking the circuit and stopping the flow of electricity. Once a fuse blows, it needs to be replaced, which adds a layer of safety against potential hazards like fires.

Because both devices perform similar protective roles in controlling current flow, the correct answer highlights the importance of recognizing both as valid methods for circuit protection. Understanding the function of these devices is crucial for maintaining safe electrical systems.