35. Explain the following.
a) Why are the coils of electric toasters and electric irons made of an alloy rather than a
pure metal.
b) Why are copper and aluminium wires usually employed for electricity transmission?
Andi
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Explanation:
a=Coils of electric toasters and electric irons made of an alloy rather than a pure metal due to the following reasons: The resistivity of an alloy is higher than the pure metal. ... Alloy does not melt readily and get deformed. Alloys have a low-temperature coefficient of resistance.
b=Copper and aluminium are good conductors of electricity. They have very low resistance and allow the current to flow through them easily. Hence, they are used to make wires for electrical transmissions.
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