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if a wire of length L is stretched from a fraction inorder to make its resistance four times the original such that its new length is 3/2 times the original length... then find the fraction by which it is increased....

if a wire of length L is stretched from a fraction inorder to make its resistance four times the original
such that its new length is 3/2 times the original length...

then find the fraction by which it is increased....

Grade:12

1 Answers

mani kanta
31 Points
9 years ago

Formula:

(R1/R2)*(l2/l1)=(A1/A2)

 

A1/A2=3/8

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