Published by:
CGP EDU Academic Team
Published on: September 12, 2026
The length of a metallic wire is increased by 20% and its area of cross-section is reduced by 4%. The percentage change in resistance of the metallic wire is
Text Solution
Verified by ExpertsThe correct answer is:
25
(25)
The given data is
Using the formula 
, the new resistance is
Hence, the percentage increase is
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A cube of metal is subjected to a hydrostatic pressure of . The percentage change in the length of…
Two steel wires having same length are suspended from a ceiling under the same load. If the ratio o…
When the temperature of a metal wire is increased from to its length increases by The percentage…
Two different wires having lengths and , and respective temperature coefficient of linear expansi…
Speed of a transverse wave on a straight wire (mass , length and area of cross-section ) is . I…
The elongation of a wire on the surface of the earth is 10 -4 m. The same wire of same dimensions i…