Question

The most important safety method used for protecting home appliances from short-circuiting or overloading is the use of _____

• A. fuse
• B. earthing
• C. switch
• D. 3 pin plug

Answer 1

The correct option is A

fuse

Fuse is a protective device to disconnect the current supply when larger than rated amount of current flows throught it. It is made up of a piece of wire of a metal that has low melting point. High current heats and melts it breaking the circuit.
Joule's heating takes place in the fuse which melts the fuse to break the electrical circuit and hence protects home appliances from short-circuiting and over-loading.