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if a wire of length L is stretched from a fraction inorder to make its resistance four times the originalsuch that its new length is 3/2 times the original length...then find the fraction by which it is increased....
Formula: (R1/R2)*(l2/l1)=(A1/A2) A1/A2=3/8
Formula:
(R1/R2)*(l2/l1)=(A1/A2)
A1/A2=3/8
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