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

The function of a fuse in an electrical circuit is to protect the circuit by breaking the connection in the event of an overload. A fuse is designed to allow normal current to flow through the circuit during regular operation. However, if the current exceeds a safe level due to a fault or overload, the fuse contains a thin metal strip or wire that melts, effectively breaking the circuit. This action prevents excessive current from causing overheating or potential fire hazards in wires and devices connected to the circuit.

This protective mechanism is essential for safeguarding electrical systems and ensuring safety by preventing damage to appliances and insulation. Therefore, the role of the fuse directly relates to the safety and reliability of electrical circuits. The other options do not accurately describe the primary purpose of a fuse and its function within an electrical system.