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A copper wire is stretched so as to incr...

A copper wire is stretched so as to increase its length by 0.2%. Calculate the percentage change in the resistance of the wire.

Text Solution

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`((R.-R)/(R )) xx 100 = ((1.002)^(2)-1) xx 100= 0.2 xx 2.002`
Percentage change in resistance = 0.4004%
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