Explain the application of heating effect of electric current in a fuse

The heating effect of electric current is used in a fuse to protect electrical circuits by melting and breaking the circuit when excess current flows. When electric current flows through a conductor, heat is produced due to resistance. This is called the heating effect of current. This principle is applied in several devices, including the safety device known as a fuse.

Working of a Fuse

• A fuse is a small wire made of a material with low melting point (like tin-lead alloy).
• It is connected in series with the circuit.
• If current exceeds safe limits, the fuse wire heats up due to the heating effect and melts.
• This breaks the circuit and prevents damage to appliances.

Applications of Fuse

1. Protects household wiring from short circuits.
2. Prevents fire hazards caused by overheating.
3. Used in electrical appliances to ensure safety.