if we increase the length of the wire three times,what will be the new resistance?will there be no change in the area of cross-section?
Asked by mrinalchatterjee | 23rd Sep, 2010, 11:14: PM
Al = volume = 3l .A'
A' = A/3
R'= ρ 9 l/A
Answered by | 28th Nov, 2010, 01:50: AM
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