HARD
JEE Advanced
IMPORTANT
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A cube with a mass =20 g wettable water floats on the surface of the water. Each face of the cube is a=3 cm long. The surface tension of water is 70 dyne cm-1. The distance of the lower face of the cube from the surface of the water is, g=980 cm s-2. 

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Important Questions on Surface Tension and Viscosity

MEDIUM
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 38
Consider vertical parallel of semi-circular cross section dipped in a liquid. Assume that the wetting of the tube is complete. The force of surface tension on the flat part and on curved part of the tube are in the ratio
EASY
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 39
Two vertical parallel glass plates are partially submerged in water. The distance between the plates is d and the length is l. Assume that the water between the plates does not reach the upper edges of the plates and that the wetting is complete. The water will rise to height (ρ= density of water and σ= surface tension of water )
MEDIUM
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 40
Two vertical parallel glass plates are partially submerged in water. The distance between the plates is d and the length is l. Assume that the water between the plates does not reach the upper edges of the plates and that the wetting is complete. The water will rise to height (ρ= density of water and σ= surface tension of water ) and the force of attraction between the plates is (Here h represents the height to which the liquid rises.)
MEDIUM
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 41
if water is replaced by another liquid of surface tension 2σ, then the force F of attraction between two plates would become
MEDIUM
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 42
A number of droplets, each of radius r, combine to form a drop of radius R. If T is the surface tension, the rise in temperature will be
MEDIUM
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 43
A drop of liquid of density ρ is floating half-immersed in a liquid of density d. If ρ is the surface tension the diameter of the drop of the liquid is
EASY
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 44
A drop of water of volume $V$ is pressed between the two glass placed so as to spread to an area A. If T is the surface tension, the normal force required to separate the glass plates is
EASY
JEE Advanced
IMPORTANT
Physics For Joint Entrance Examination JEE (Advanced): Mechanics II>Chapter 8 - Surface Tension and Viscosity>Exercises>Q 45
A thin square plate of side 5.cm is suspended vertically from a balance so that lower side just dips into water with side to surface. When the plate is clean θ=0°, it appears to weigh 0.044 N. But when the plate is greasy θ=180°, it appears to weigh 0.03 N. The surface tension of water is