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# ICSE Class 10 Answered

A 10 ohm thick wire is stretched so that its lengh becomes 3 times  Calculate resistance oof new wire
Asked by lovemaan5500 | 15 Mar, 2018, 07:17: AM
Expert Answer
Resistance R =
where ρ is specific resistance, L is length of conductor and A is area of cross section.

If the wire is stretched 3 times, length is increased by 3 times, cross section area is reduced by 3 times because volume is constant

Volume V = L×A = (3L)×(A/3)

hence new resistance R' =
Answered by Thiyagarajan K | 15 Mar, 2018, 01:13: PM

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