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TOPIC :PROPERTIES OF MATTER

Number of questions are 287, Select_Question:

Number of questions are 287, Select_Question:

Q1) Two wires A and B are of the same material. Their lengths are in the ratio 1 :2 and the diameter are in the ratio 2:1. If they are pulled by the same force, then increase in length will be in the ratio [ CBSE-PMT 1988]

SOLUTION

Formula for Young's modulus is

Since Y and F are same there fore

since D1=2D2

L2=2 L1

substituting the values in above we get

l1:l2=1:8

Answer: (c)