(b) Name the electrical property of a material whose symbol is "omega".
(c) Name a material which is used for making the heating elements of
electrical appliances,
(d) Give two reasons why the above material is used for the said purpose.
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Resistance is represented by the symbol Omega, Ω. Resistance has the following electrical properties: The resistance of a conductor depends on its length.
Nichrome: Most resistance wire heating elements 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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