In a capillary tube having area of cross-section A , the water rises to a height h . If the cross-sectional area is reduced to A 9 , the rise of water in the capillary tube is

Question

In a capillary tube having area of cross-section A , the water rises to a height h . If the cross-sectional area is reduced to A 9 , the rise of water in the capillary tube is, 4 h, 3 h, 2 h, h

MARKS App · Accepted Answer

A 1 = π r 1 2 A 2 = π r 2 2 π r 1 2 9 = π r 2 2 r 1 2 r 2 2 = 9 ⇒ r 1 r 2 = 3 r h = constant r 1 h 1 = r 2 h 2 r 1 r 2 = h 2 h 1 3 = h 2 h 1 = h 2 h 1 h 2 = 3 h 1 = 3 h

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