Resistance of a given qire od length "l" is 4 ohm.wire is stretched uniformly such that its length becomes 3 l.find the new resistance of the streached wire
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Answered by
27
Answer: R' = 36 ohm
Explanation:
R'= rho × 3l ÷A/3
R'=9(rho×l/A)
R'=9×4
R'=36 ohm
Answered by
6
since, resistance is directly proportional to length but indirectly proportional to area of cross sectional.
I hope it helps.
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