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NTA Abhyas JEE Main2020PhysicsMechanical Properties of FluidsPractice

A very narrow capillary tube records a rise of 20 c m when dipped in water. When the area of cross-section is reduced to one-fourth of former value, water will rise to a height of

Options

  1. A10 c m
  2. B20 c m
  3. C40 c m
  4. D80 c m

Correct answer

C. 40 c m

Step-by-step solution

A ∝ r 2 ∴ radius becomes half. As Hr = constant . ∴ H becomes double.

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