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A copper wire of resistance R(0) is stre...

A copper wire of resistance `R_(0)` is strerched till its length is increased to n times of its original length. What will be its new resistance?

Text Solution

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`R. = n^2 R `
` therefore R. = rho (nL)/( A//n) = rho n ^2 (I)/(A) = n^2 R `
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