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Conductors and Insulators

e Explain: e ...

Question

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

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?

(c) Why is the series arrangement not used for domestic circuits?

(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?

Q. Explain the following:
(a) Why is tungsten used almost exclusively for filament of electric lamps?
(b) Why are copper and aluminium wires usually used for electricity transmission?
(c)Why is nichrome alloy used for making elements of electric irons?

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Conductors and Insulators

Standard X Physics

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