a wire of resistivity 'r' is pulled to double its lenght.what will be its resistivity
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R is directly proportional to length. therefore resistance will be double
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R directly proportional to lenght
R1 = l
R2 = 2*l
On dividing
R2/R1 = l2/l
Thus, R2 = 2* R 1
R1 = l
R2 = 2*l
On dividing
R2/R1 = l2/l
Thus, R2 = 2* R 1
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