1.

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

Answer»

SOLUTION :Coils of electric toasters and electric IRONS are made of an ALLOY DUE to the following two reasons:
(i) Resistivity of an alloy is generally higher than that of pure metals, hence for a given resistance we need a coil of LESSER length.
(ii) At high temperature, an alloy does not oxidise readily. Hence, coil of an alloy has longer life.


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