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Question

Two wires of the same material and length are stretched by the same force. Their masses are in the ratio 3:2. Their elongations are in the ratio
  1. 9 : 4
  2. 2 : 3
  3. 4 : 9
  4. 3 : 2


Solution

The correct option is B 2 : 3

Y=FlA lor  l 1A
Again, m=Alp,m A
 l 1m
Therefore  l1 l2=m2m1=23

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