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JEE Main20257 Apr 2025Evening ShiftPhysicsMechanical Properties of FluidsActual

A capillary tube of radius 0.1 mm is partly dipped in water (surface tension 70 dyn / cm and glass water contact angle 0^ ) with 30^ inclined with vertical. The length of water risen in the capillary is ________ cm. ( . Take . g =9.8 ~m / s ^2 )

Options

  1. A82 5
  2. B57 2
  3. C71 5
  4. D68 5

Correct answer

A. 82 5

Step-by-step solution

aligned & h = 2 ~T gr = 2 70 1 1 980 10⁻² & ~h = 100 7 ~cm & 60^ = h & = h 2 3 & = 100 7 2 3 & = 200 7 3 & =16.49 ~cm aligned

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