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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

The Young's modulus of a rubber string 8 cm long, of density (as given) is , is suspended on the ceiling in a room. The increase in length due to its own weight will be [AIIMS 1986, Similar RPET 1996]

Answer: (B)

Solution

\dfrac{ρ gL^2}{2Y}\dfrac{1.5×9.8×(0.08)^2}{2×5×10^8}\t$

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Question ID VK-155093