Coils of electric toasters and electric irons made of an alloy rather than a pure metal due to the following reasons:
- The resistivity of an alloy is higher than the pure metal.
- At high temperatures, the alloys do not oxidize.
- Alloy does not melt readily and get deformed.
- Alloys have a low-temperature coefficient of resistance
Hence, the coils of heating appliances such as electric toasters and electric irons are made of an alloy rather than a pure metal.