Question

What is short circuiting? State one factor/condition that can lead to it. Name a device in the household that acts as a safety measure for it. State the principle of its working.

Answer 1

When the live wire and the neutral wire come into direct contact then the current in the circuit abruptly increases. This is called short circuiting.

Factor - Insulation of wire is damaged / fault in appliance.

Safety device - electric fuse.

Electric fuse is an application of Joule’s heating. If there is a current larger than the specified value the temperature of [use wire increases and it melts to break the electric circuit and stop the flow of unduly high electric current.