What is the primary function of a fuse in an electrical circuit?

The primary function of a fuse in an electrical circuit is to protect against overloads. A fuse is designed to interrupt the flow of current when it exceeds a certain level, which helps prevent overheating and potential damage to the electrical system or connected devices. When too much current flows through a circuit—such as during a fault condition or an overload—the fuse's element melts, breaking the circuit and stopping the flow of electricity. This protective feature plays a crucial role in ensuring safety and preventing fires or equipment damage that could result from excessive current levels.

The other options involve different aspects of electrical circuits, but they do not accurately describe the unique protective role that a fuse plays in safeguarding against overload conditions.