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A glass capillary tube of radius r is pl...

A glass capillary tube of radius r is placed vertically touching the surface of water. The water rises to height h in capillary tube. If now the tube is dipped into water till only `h/2` length of it is outside the water surface the , radius of curvature of the meniscus of water in capillary tube will be,

A

`r/2`

B

`(3r)/2`

C

`2r`

D

`(2r)/3`

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The correct Answer is:
C
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