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

• A. To increase voltage
• B. To provide resistance
• C. To prevent excessive current flow
• D. To stabilize power flow

Answer: (C)

A fuse serves a critical safety function in an electrical circuit by preventing excessive current flow. When the current flowing through a fuse exceeds its rated limit, the fuse element melts, breaking the circuit and stopping the flow of electricity. This protects the wiring and components of the circuit from damage due to overheating or potential fires caused by excessive current.

Understanding the importance of fuses highlights their role in safeguarding electronic equipment and ensuring that circuits operate within safe parameters. Other options like increasing voltage, providing resistance, or stabilizing power flow do not align with the primary function of a fuse, which is specifically designed to protect against overcurrent situations.