Question

Explain why coils of electric toasters and electric irons made of an alloy rather than a pure metal?

Answer 1

Explanation:

1. An electric toaster and iron coils are made of an alloy rather than a pure metal because an alloy has a higher resistance than a pure metal.
2. The alloys also do not melt easily at high temperatures.

Difference between an alloy and a metal:

Alloy	Metal
1. Alloys have high resistivity, so they can generate more heat for the same amount of current passing through them.	1. Metals have lower resistivity than alloys.
2. Alloys have a high melting point, so they do not melt readily.	2. Metals have a lower melting point than an alloy.
3. Alloys have a low-temperature coefficient of resistance.	3. Metals have a high-temperature coefficient of resistance.