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If length of a wire is streched to 'n' times of it's length find new resistance?
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If length of a wire is streched to 'n' times of it's length find new r...
I suppose that the cross sectional area A of the original wire is constant along its length, and the same for the stretched wire (although its cross sectional area Al is clearly different). 
It is known and is not of big surprise that the resistance of a wire from the same material in the same conditions is directly proportional to its length L and is inversely proportional to its cross sectional area A, 

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If length of a wire is streched to 'n' times of it's length find new resistance?
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