Q22 of 27 Page 10

Why are copper and aluminium wires used for electrical transmission?

Both copper and aluminium are good conductors of electricity, hence they are employed for electrical transmission.


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20

Why closed path is required for flow of current?

 21

What happens to the resistance of a conductor if the area of cross section is increased?

 23

What helps to maintain the potential difference across a conductor?

 24

Write one advantage of connecting devices in parallel and not in series.