Question

The length of a wire is tripled and its area of crossection is doubled, how does it

affect the resistivity of the wire. Give reason in support of your answer.

Answer 1

In this case their will be no change in resistance. The resistance of a long wire is greater than the resistance of a short wirebecause electrons collide with ions more often. The resistance of a thinwire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current.
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