Published by:
CGP EDU Academic Team
Published on: September 13, 2026
If a copper wire is stretched to increase its length by 20%. The percentage increase in resistance of the wire is ______%.
Text Solution
Verified by ExpertsThe correct answer is:
44
(44)
As volume is constant,
So resistance 
(length) 2
% change in resistance = 20 + 20 + 
= 44%
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