Q23 of 27 Page 10

What helps to maintain the potential difference across a conductor?

The cell (battery eliminator) maintains the potential difference across a conductor.


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21

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

 22

Why are copper and aluminium wires used for electrical transmission?

 24

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

 25

Give one difference between open circuit & closed circuit?