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

The purpose of a fuse in an electrical circuit is to break the circuit in the event of overcurrent. A fuse is designed as a safety device that protects electrical circuits from excessive current that can cause overheating and potentially lead to damage or fire. When the current exceeds a predetermined level, the fuse will “blow” or melt, thereby interrupting the flow of electricity and preventing further damage to the circuit components or the surrounding environment. This protective function is critical for maintaining safety in electrical systems.

Increasing current flow, decreasing voltage levels, and storing electric charge are functions associated with other electrical components and do not align with the role of a fuse in an electrical circuit.