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

• A. To remove power in case of overload
• B. To regulate voltage
• C. To provide additional current
• D. To filter electrical noise

Answer: (A)

The purpose of a fuse in an electrical circuit is primarily to remove power in case of an overload. A fuse is a safety device designed to protect electrical circuits from excessive current flow that can lead to overheating and possibly cause damage or fire. It consists of a metal wire or strip that melts when the current exceeds a certain threshold (the fuse rating), effectively breaking the circuit and stopping the flow of electricity. This interruption protects the wiring, components, and any connected devices from potential damage that could occur during an overload condition.

In contrast, regulation of voltage is typically achieved using devices like voltage regulators, while fuses do not function to increase or provide additional current. Filtering electrical noise may be handled by capacitors or other types of filters, not by fuses. Thus, the role of the fuse is critical in ensuring safety and preventing damage within electrical systems.