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

The function of a fuse in an electrical circuit is to prevent overcurrent by breaking the circuit. A fuse is a safety device designed to protect electrical circuits from excessive current that can cause damage to devices, overheating, or even fires. When the current flowing through the fuse exceeds its rated capacity, the fuse element melts or breaks, interrupting the flow of electricity. This action effectively disconnects the circuit and prevents further current from passing through, safeguarding both the circuit and connected devices.

The other options describe functions that are not related to the purpose of a fuse. For example, increasing the voltage supply does not align with the protective role of a fuse, measuring electrical resistance is the function of an ohmmeter, and storing energy temporarily is typically the function of capacitors or batteries, not fuses.