Two parallel glass plates are dipped partly in the liquid of density 'd' keeping them vertical. If the distance between the plates is 'x', surface tension for liquids is T and the angle of contact is θ, then rise of liquid between the plates due to capillary will be 

(1) T cosθxd

(2) 2T cosθxdg

(3) 2T xdgcosθ

(4) T cosθxdg

Subtopic:  Capillary Rise |
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Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by 75×10-4 N force due to the weight of the liquid. If the surface tension of water is 6×10-2 Nm-1, the inner circumference of the capillary must be:

1. 1.25×10-2 m 

2. 0.50×10-2 m

3. 6.5×10-2 m

4. 12.5×10-2 m

Subtopic:  Capillary Rise |
 57%
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Two capillary tubes P and Q are dipped in water. The height of water level in capillary P is 2/3 to the height in Q capillary. The ratio of their diameters is

(1) 2 : 3                           

(2) 3 : 2

(3) 3 : 4                           

(4) 4 : 3

Subtopic:  Capillary Rise |
 84%
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A vessel, whose bottom has round holes with a diameter of 0.1mm, is filled with water. The maximum height to which the water can be filled without leakage is
(S.T. of water =75 dyne/cm, g =1000 cm/s2)

(1) 100 cm

(2) 75 cm

(3) 50 cm

(4) 30 cm

Subtopic:  Capillary Rise |
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By inserting a capillary tube up to a depth l in water, the water rises to a height of h ( h<l). If the lower end of the capillary is closed inside the water and the capillary is taken out and closed-end opened, to what height the water will remain in the tube?

(1) Zero

(2) l+h 

(3) 2h

(4) h

Subtopic:  Capillary Rise |
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A capillary tube when immersed vertically in liquid records a rise of 3 cm. If the tube is immersed in the liquid at an angle of 60° with the vertical. The length of the liquid column along the tube is 

(1) 9cm

(2) 6cm

(3) 3cm

(4) 2cm

Subtopic:  Capillary Rise |
 78%
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The action of a nib split at the top is explained by

1. Gravity flow

2. Diffusion of fluid

3. Capillary action

4. Osmosis of liquid

Subtopic:  Capillary Rise |
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The correct relation is

(1) r=2Tcosθhdg

(2) r=hdg2Tcosθ

(3) r=2Tdghcosθ

(4) r=Tcosθ2hdg

Subtopic:  Capillary Rise |
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During the capillary rise of a liquid in a capillary tube, the surface of contact that remains constant is of

(1) Glass and liquid

(2) Air and glass

(3) Air and liquid

(4) All of these

Subtopic:  Capillary Rise |
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A shell having a hole of radius r is dipped in water. It holds the water up to a depth of h then the value of r is

(1) r=2Thdg

(2) r=Thdg

(3) r=Tghd

(4) None of these

Subtopic:  Capillary Rise |
 91%
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