What is the primary function of fuses in electrical circuits?

The primary function of fuses in electrical circuits is to protect circuits from excessive current. A fuse is designed to break the circuit and stop the flow of electricity when the current exceeds a certain level. This safety mechanism helps prevent overheating, electrical fires, and damage to appliances or components connected to the circuit.

In operation, when current flows through the fuse, it encounters a thin metal wire or filament that melts if the current becomes too high. This melting interrupts the circuit and effectively prevents further current flow, safeguarding the entire electrical system.

This protection is crucial in maintaining the integrity of the electrical installation and ensuring safety for users. The other options do not align with the function of a fuse, as they either relate to power supply capabilities, signal processing, or power conversion, which are not relevant to the role of a fuse in the circuit.