Question

Explain :
Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?

Answer 1

For a heating device, certain properties are useful for efficient working. Some metals are good in some properties, while some are good in others. Alloys are a mixture of metals. Mixing of alloys can also sometimes increase the desirable properties. Some of these properties are listed below:

1. High resistance
2. High melting point
3. Low thermal expansion