Question

Name a safety device which is used to limit the current in an electrical circuit. The use of this device safeguards the circuit and the appliances connected in that circuit from being damaged.

Answer 1

Fuse wire:

1. A fuse wire mainly consists of a small piece of wire of a material with a very low melting point.
2. It melts and breaks the circuit as soon as its temperature gets higher than its melting point.
3. It has a high resistivity.
4. Fuse wires are mainly made up of those metals, which have a low melting point like tin, lead, or zinc.

Fuse wire as a safety device:

1. A fuse wire is a safety device that is used to limit the current in an electrical circuit.
2. A fuse is an electrical safety device that has the capability to protect an electric circuit from excessive electric current.
3. Fuse wire is used as a safety wire when connected in series with the live wire.
4. When there are excessive ups and downs in current across a circuit, fuse wire melts and breaks the electric circuit.
5. Fuse wire protects the circuit and other electrical appliances by stopping the flow of excess current.

Hence, a fuse wire is a safety device that protects the appliances.