Question

Why the heating elements of electrical heating appliances such as electric iron and toaster,etc.,are made up of an alloy rather than a pure metal

Answer 1

Dear student
Conductors of electric heating devices are made of an alloy rather than a pure metal due to the following reasons :

(1) Resistivity of an alloy is generally higher than that of pure metals, .when the current is passed through an element made of alloy, a large amount of heat is produced.

(2) At high temperatures an alloy does not oxidise (burn) readily. Hence, heating element prepared from an alloy has longer life.

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