Two capillary tubes of the same material but of different radii are dipped in a liquid. The heights to which the liquid rises in the two tubes are 2.2 cm and 6.6 cm. The ratio of radii of the tubes will be1:91:39:13:1 (2024)

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Standard XII

Physics

Question

1:3

1:9

9:1

3:1

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Solution

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Since we know that height of capillary rise is inversely proportional to radii of tube, i.e.,

height ∝1radius

h1h2=r2r1⇒2.2cm6.6cm=r2r1

So, r1r2=3

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