MHT CET 2024 Physics question
When capillary is dipped vertically in water, rise of water in capillary is 'h'. The angle of contact is zero. Now the tube is depressed so that its length above the water surface is . The new apparent angle of contact is
Answer: (B)
Solution
Capillary rise is . Initially , so . When the tube is pushed down so that only a length projects above the water, the meniscus cannot rise to ; instead its radius of curvature adjusts so that the effective
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