An electric iron uses a heating element made of an alloy instead of pure metal. Which property of alloys justifies this choice?

Question

An electric iron uses a heating element made of an alloy instead of pure metal. Which property of alloys justifies this choice? — Exam MCQ

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A. Alloys have higher resistivity and do not oxidise readily at high temperatures — Heating elements need high resistance so that electrical energy is converted efficiently into heat. Suitable alloys also withstand high temperatures without oxidising rapidly.

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B. Alloys are cheaper

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C. Alloys are better conductors

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D. Alloys have lower resistivity

An electric iron uses a heating element made of an alloy instead of pure metal. Which property of alloys justifies this choice?

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