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JEE Main 2014 Physics question

PhysicsMechanical Properties of FluidsJEE Main 2014

A capillary tube is immersed vertically in water and the height of the water column is . When this arrangement is taken into a mine of depth d, the height of the water column is . If R is the radius of earth, the ratio is :

Answer: (4)

Solution

Capillary rise is , so . At depth d inside the earth, $g' =

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Question ID VK-104352