Question

A fuse is used in an electrical appliance :

• A. To change the efficiency of the applicance
• B. To change the current rating of the applicance
• C. To earth the appliance
• D. To protect the appliance and its cable

Answer 1

Answer: (D)

Fuse is a device used to prevent overheating of appliances due to a sudden increase in the current in the circuit.
It protects the device and the user. When the electric current is higher than the normal current needed by a circuit, the fuse blows up and breaks the circuit.
Hence, it protects the circuit from a power overload.