Question

(a) Name the electrical appliance shown in the diagram below.

(b) Name the material of the wire used in this device.

(c) Name two important characteristics of this wire.

Answer 1

1. The electrical appliance shown in the diagram is called 'Fuse'.
2. The material used in 'Fuse' wire is made up of an alloy of lead (Pb) and tin (Sn) having a low melting point of 250°C.
3. Characteristics of Fuse wire:
   • It has high resistivity.
   • It has a low melting point.
   • It prevents electrical appliances from being damaged by a surge of high voltage current.
   • It is made up of alloys of lead (Pb) and tin (Sn).