Most Important Selected Qs for JEE AdvancedPhysicsMechanical Properties of Fluids
A vertical capillary tube with inside radius 0.25 mm is submerged into water so that the length of its part protruding over the water surface is equal to 25 mm . surface tension of water is 73 10⁻³ N / m and angle of contact is zero degree for glass and water, acceleration due to gravity is 9.8 m / s ^2 . Then choose correct statement. where R is radius of meniscus and h is height of water in capillary tube.
Options
- AR = 0.25 mm
- Bh = 59.6 mm
- CR = 0.60 mm
- Dh = 25 mm
Correct answer
D. h = 25 mm
Step-by-step solution
aligned & Capillary height h = 2 ~T r g & h =59.6 ~mm aligned here 59.6 mm is greater than the protruding part hence water will rise in the capillary of insufficient height 25 mm . Now, R= 2 T hrg =0.6 ~mm