Why are copper and aluminium wires usually employed for electricity transmission?

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Solution

The correct option is C
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Copper and aluminium wires are generally used for electricity transmission as they have low resistivity. Low resistivity decreases the resistance and hence increases the amount of current in the circuit. Therefore, they are good conductors of electricity.

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Why are copper and aluminium wires usually employed for electricity transmission? [1 MARK]

Why are copper and aluminium wires usually used for electricity transimission?

Explain the following.

(a) Why is the tungsten used almost exclusively for filament of electric lamps?

(b) Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?

(d) How does the resistance of a wire vary with its area of cross-section?

(e) Why are copper and aluminium wires usually employed for electricity transmission?

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