Why are alloys preferred for the heating elements in devices like toasters?
They have higher resistivity and do not oxidise readily at high temperatures
Heating elements need a material that converts electrical energy into a large amount of heat efficiently and can withstand repeated heating.
Alloys such as nichrome have comparatively higher resistivity than pure metals, which generates more heat, and they resist oxidation even when they glow red hot repeatedly.
Hence, alloys are preferred because they have higher resistivity and do not oxidise readily at high temperatures.
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