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 from overcurrent by breaking the connection. A fuse is a safety device that contains a metal wire or strip that melts when the current flowing through it exceeds a certain threshold, which is determined by the fuse's rating. This melting action interrupts the flow of electricity, effectively disconnecting the circuit and preventing potential damage to appliances, wiring, and other components that could result from excessive current.

Using a fuse is essential for maintaining safety in electrical systems because it helps to prevent overheating, fires, and other hazardous situations that can arise from overcurrent conditions. By interrupting the flow of electricity, fuses ensure that the circuit operates within safe limits, thereby providing essential protection to both equipment and users.