Question 18 (e)
Explain:
(e) Why are copper and aluminum wires usually employed for electricity transmission?

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Solution

Copper and aluminum are good conductors of electricity also they have low resistivity. So they are usually used for electricity transmission.

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

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

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?

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

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