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Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal

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Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?

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Coils of electric toasters and electric irons are made of an alloy rather than a pure metal because
(i) the resistivity of an alloy is much higher than that of pure metal and
(ii) an alloy does not undergo oxidation easily even at high temperature.

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