Question

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Why are the coils of electric toaster and electric iron made of all the rather than a pure metal ?​

Answer 1

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Coils of electric toasters and electric irons made of an alloy rather than a pure metal because the resistivity of an alloy is higher than the pure metal. Also at high temperatures, the alloys do not melt easily.

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Answer 2

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Resistivity of Alloy is higher than that of metal. Moreover , alloy only do not oxide(burn) readily even at high temperatures. Therefore, coils of electric toaster and electric iron and other such devices are made up of alloy rather than a pure metal.

Generally nichrome is used in such devices .