What is the primary purpose of fuses in electrical circuits?

The primary purpose of fuses in electrical circuits is to protect circuits from overcurrent. Fuses are safety devices designed to interrupt the flow of electricity when the current exceeds a certain level, which can prevent overheating and potential damage to components or even fire hazards. When an overcurrent occurs, the fuse element melts, breaking the circuit and stopping the electrical flow, effectively preventing any damage that might result from excessive current. This function is crucial for ensuring the reliability and safety of electrical systems.

While other options may represent specific functions associated with electrical components or systems, fuses are not designed to increase current flow, regulate voltage levels, or enhance signal quality. Instead, their primary role is ensuring that electrical circuits operate safely within their current limits.