3. Which material is commonly used to make elements of heating appliances? Why?
a) alloys such as nichrome are commonly used in heating appliances because they offer a high resistance and high melting point
b) A wire of high resistance because it offers resistance and converts electric energy to heat energy
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Nichrome: Most resistance wire heating elements usually use nichrome 80/20 (80% Nickel, 20% Chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.
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Ans.The material which is used to make the heating coils of electrical heating devices is called nichrome. Explanation: Nichrome is nothing but an alloy of Nickel and chromium. It has a special characteristics that it has high boiling point as well as melting point and high resistance.
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