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Q.

A liquid is filled in a spherical container of radius R till a height h. At this positions the liquid surface at the edges is also horizontal. The contact angle is

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a

cos−1⁡R−hR

b

sin−1⁡R−hR

c

0

d

cos−1⁡h−RR

answer is B.

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Detailed Solution

cos⁡θ=R−hR⇒(θ)=cos-1R−hR

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