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question_answer1)
When two capillary tubes of different diameters are dipped vertically, the rise of the liquid is [NCERT 1978]
A)
Same in both the tubes done
clear
B)
More in the tube of larger diameter done
clear
C)
Less in the tube of smaller diameter done
clear
D)
More in the tube of smaller diameter done
clear
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question_answer2)
Due to capillary action, a liquid will rise in a tube, if the angle of contact is [DPMT 1984; AFMC 1988; BHU 2001]
A)
Acute done
clear
B)
Obtuse done
clear
C)
90° done
clear
D)
Zero done
clear
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question_answer3)
In the state of weightlessness, a capillary tube is dipped in water, then water
A)
Will not rise at all done
clear
B)
Will rise to same height as at atmospheric pressure done
clear
C)
Will rise to less height than at atmospheric pressure done
clear
D)
Will rise up to the upper end of the capillary tube of any length done
clear
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question_answer4)
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 angle of contact is \[\theta \], then rise of liquid between the plates due to capillary will be [NCERT 1981]
A)
\[\frac{T\cos \theta }{xd}\] done
clear
B)
\[\frac{2T\cos \theta }{xdg}\] done
clear
C)
\[\frac{2T}{xdg\cos \theta }\] done
clear
D)
\[\frac{T\cos \theta }{xdg}\] done
clear
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question_answer5)
Water rises in a capillary tube to a certain height such that the upward force due to surface tension is balanced by \[75\times {{10}^{-4}}N\] force due to the weight of the liquid. If the surface tension of water is \[6\times {{10}^{-2}}\,N{{m}^{-1}}\], the inner circumference of the capillary must be [CPMT 1988, 86]
A)
\[1.25\times {{10}^{-2}}m\] done
clear
B)
\[0.50\times {{10}^{-2}}m\] done
clear
C)
\[6.5\times {{10}^{-2}}m\] done
clear
D)
\[12.5\times {{10}^{-2}}m\] done
clear
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question_answer6)
It is not possible to write directly on blotting paper or newspaper with ink pen
A)
Because of viscosity done
clear
B)
Because of inertia done
clear
C)
Because of friction done
clear
D)
Because of capillarity done
clear
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question_answer7)
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 [MP PMT 1985]
A)
2 : 3 done
clear
B)
3 : 2 done
clear
C)
3 : 4 done
clear
D)
4 : 3 done
clear
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question_answer8)
Two capillaries made of same material but of different radii are dipped in a liquid. The rise of liquid in one capillary is 2.2 cm and that in the other is 6.6 cm. The ratio of their radii is [MP PET 1990]
A)
9 : 1 done
clear
B)
1 : 9 done
clear
C)
3 : 1 done
clear
D)
1 : 3 done
clear
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question_answer9)
Two capillaries made of the same material with radii \[{{r}_{1}}=1mm\] and \[{{r}_{2}}=2mm\]. The rise of the liquid in one capillary (\[{{r}_{1}}=mm\]) is 30 cm, then the rise in the other will be [MP PET 1991]
A)
7.5 cm done
clear
B)
60 cm done
clear
C)
15 cm done
clear
D)
120 cm done
clear
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question_answer10)
When a capillary is dipped in water, water rises to a heig ht \[h\]. If the length of the capillary is made less than\[h\], then
A)
The water will come out done
clear
B)
The water will not come out done
clear
C)
The water will not rise done
clear
D)
The water will rise but less than height of capillary done
clear
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question_answer11)
Water rises upto 10 cm height in a long capillary tube. If this tube is immersed in water so that the height above the water surface is only 8 cm, then [MP PMT 1991]
A)
Water flows out continuously from the upper end done
clear
B)
Water rises upto upper end and forms a spherical surface done
clear
C)
Water only rises upto 6 cm height done
clear
D)
Water does not rise at all done
clear
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question_answer12)
A vessel, whose bottom has round holes with 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) [CPMT 1989; J&K CET 2004]
A)
100 cm done
clear
B)
75 cm done
clear
C)
50 cm done
clear
D)
30 cm done
clear
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question_answer13)
Water rises in a capillary tube when its one end is dipped vertically in it, is 3 cm. If the surface tension of water is\[75\text{ }\times \text{ }{{10}^{-3}}N/m\], then the diameter of capillary will be [MP PET 1989]
A)
0.1 mm done
clear
B)
0.5 mm done
clear
C)
1.0 mm done
clear
D)
2.0 mm done
clear
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question_answer14)
A capillary tube made of glass is dipped into mercury. Then [MP PET 1996]
A)
Mercury rises in the capillary tube done
clear
B)
Mercury rises and flows out of the capillary tube done
clear
C)
Mercury descends in the capillary tube done
clear
D)
Mercury neither rises nor descends in the capillary tube done
clear
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question_answer15)
By inserting a capillary tube upto a depth l in water, the water rises to a height h. If the lower end of the capillary is closed inside water and the capillary is taken out and closed end opened, to what height the water will remain in the tube [RPET 1996; DPMT 2000]
A)
Zero done
clear
B)
\[l+h\] done
clear
C)
2h done
clear
D)
h done
clear
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question_answer16)
If the diameter of a capillary tube is doubled, then the height of the liquid that will rise is [CPMT 1997]
A)
Twice done
clear
B)
Half done
clear
C)
Same as earlier done
clear
D)
None of these done
clear
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question_answer17)
If the surface tension of water is 0.06 Nm-1, then the capillary rise in a tube of diameter 1 mm is (\[\theta \]=0° ) [AFMC 1998]
A)
1.22 cm done
clear
B)
2.44 cm done
clear
C)
3.12 cm done
clear
D)
3.86 cm done
clear
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question_answer18)
Two capillary tubes of radii 0.2 cm and 0.4 cm are dipped in the same liquid. The ratio of heights through which liquid will rise in the tubes is [MNR 1998]
A)
1 : 2 done
clear
B)
2 : 1 done
clear
C)
1 : 4 done
clear
D)
4 : 1 done
clear
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question_answer19)
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 \[{{60}^{0}}\]with the vertical. The length of the liquid column along the tube is [MH CET (Med.)1999]
A)
9cm done
clear
B)
6cm done
clear
C)
3cm done
clear
D)
2cm done
clear
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question_answer20)
The action of a nib split at the top is explained by [JIPMER 1999]
A)
Gravity flow done
clear
B)
Diffusion of fluid done
clear
C)
Capillary action done
clear
D)
Osmosis of liquid done
clear
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question_answer21)
The correct relation is [RPMT 2002]
A)
\[r=\frac{2T\,\cos \theta }{hdg}\] done
clear
B)
\[r=\frac{hdg}{2T\,\cos \theta }\] done
clear
C)
\[r=\frac{2T\,dgh}{\cos \theta }\] done
clear
D)
\[r=\frac{T\cos \theta }{2hdg}\] done
clear
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question_answer22)
Water rises upto a height h in a capillary on the surface of earth in stationary condition. Value of h increases if this tube is taken [RPET 2000]
A)
On sun done
clear
B)
On poles done
clear
C)
In a lift going upward with acceleration done
clear
D)
In a lift going downward with acceleration done
clear
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question_answer23)
During capillary rise of a liquid in a capillary tube, the surface of contact that remains constant is of [Pb. PMT 2000]
A)
Glass and liquid done
clear
B)
Air and glass done
clear
C)
Air and liquid done
clear
D)
All of these done
clear
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question_answer24)
A shell having a hole of radius r is dipped in water. It holds the water upto a depth of h then the value of r is [RPMT 2000]
A)
\[r=\frac{2T}{hdg}\] done
clear
B)
\[r=\frac{T}{hdg}\] done
clear
C)
\[r=\frac{Tg}{hd}\] done
clear
D)
None of these done
clear
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question_answer25)
In a capillary tube, water rises by 1.2 mm. The height of water that will rise in another capillary tube having half the radius of the first, is [CPMT 2001; Pb. PET 2002]
A)
1.2 mm done
clear
B)
2.4 mm done
clear
C)
0.6 mm done
clear
D)
0.4 mm done
clear
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question_answer26)
If capillary experiment is performed in vacuum then for a liquid there [RPET 2001]
A)
It will rise done
clear
B)
Will remain same done
clear
C)
It will fall done
clear
D)
Rise to the top done
clear
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question_answer27)
If liquid level falls in a capillary then radius of capillary will [RPET 2001]
A)
Increase done
clear
B)
Decrease done
clear
C)
Unchanged done
clear
D)
None of these done
clear
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question_answer28)
Water rises to a height h in a capillary at the surface of earth. On the surface of the moon the height of water column in the same capillary will be [MP PMT 2001]
A)
6h done
clear
B)
\[\frac{1}{6}h\] done
clear
C)
h done
clear
D)
Zero done
clear
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question_answer29)
Two capillary tubes of same diameter are put vertically one each in two liquids whose relative densities are 0.8 and 0.6 and surface tensions are 60 and 50 dyne/cm respectively Ratio of heights of liquids in the two tubes \[\frac{{{h}_{1}}}{{{h}_{2}}}\]is [MP PMT 2002]
A)
\[\frac{10}{9}\] done
clear
B)
\[\frac{3}{10}\] done
clear
C)
\[\frac{10}{3}\] done
clear
D)
\[\frac{9}{10}\] done
clear
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question_answer30)
Water rises in a vertical capillary tube upto a height of 2.0 cm . If the tube is inclined at an angle of \[{{60}^{o}}\] with the vertical, then upto what length the water will rise in the tube [UPSEAT 2002]
A)
2.0 cm done
clear
B)
4.0 cm done
clear
C)
\[\frac{4}{\sqrt{3}}cm\] done
clear
D)
\[2\sqrt{2\,}cm\] done
clear
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question_answer31)
The surface tension for pure water in a capillary tube experiment is [MH CET 2002]
A)
\[\frac{\rho g}{2hr}\] done
clear
B)
\[\frac{2}{hr\rho g}\] done
clear
C)
\[\frac{r\rho g}{2h}\] done
clear
D)
\[\frac{hr\rho g}{2}\] done
clear
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question_answer32)
In a capillary tube experiment, a vertical 30 cm long capillary tube is dipped in water. The water rises up to a height of 10cm due to capillary action. If this experiment is conducted in a freely falling elevator, the length of the water column becomes [Orissa JEE 2003; AIEEE 2005]
A)
10 cm done
clear
B)
20 cm done
clear
C)
30 cm done
clear
D)
Zero done
clear
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question_answer33)
Radius of a capillary is \[2\times {{10}^{-3}}m.\] A liquid of weight \[6.28\times {{10}^{-4}}N\] may remain in the capillary then the surface tension of liquid will be [RPET 2003]
A)
\[5\times {{10}^{-3}}N/m\] done
clear
B)
\[5\times {{10}^{-2}}N/m\] done
clear
C)
\[5\,N/m\] done
clear
D)
\[50\,N/m\] done
clear
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question_answer34)
Two long capillary tubes A and B of radius RB>RA dipped in same liquid. Then [Orissa PMT 2004]
A)
Water rise is more in A than B done
clear
B)
Water rises more in B than A done
clear
C)
Same water rise in both done
clear
D)
All of these according to the density of water done
clear
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question_answer35)
If water rises in a capillary tube upto 3 cm. What is the diameter of capillary tube (Surface tension of water\[=\text{ }7.2\text{ }\times {{10}^{2}}N/m\]) [RPMT 2002]
A)
\[9.6\times {{10}^{4}}m\] done
clear
B)
\[9.6\times {{10}^{3}}m\] done
clear
C)
\[9.6\times {{10}^{2}}m\] done
clear
D)
\[9.6\times {{10}^{1}}m\] done
clear
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question_answer36)
When a capillary is dipped in water, water rises 0.015 m in it. If the surface tension of water is\[75\times {{10}^{3}}N/m\], the radius of capillary is [RPMT 2003]
A)
0.1 mm done
clear
B)
0.5 mm done
clear
C)
1 mm done
clear
D)
2 mm done
clear
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question_answer37)
In a capillary tube, water rises to 3 mm. The height of water that will rise in another capillary tube having one-third radius of the first is [BHU 2004]
A)
1 mm done
clear
B)
3 mm done
clear
C)
6 mm done
clear
D)
9 mm done
clear
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question_answer38)
Kerosene oil rises up the wick in a lantern [NCERT 1980; MNR 1985]
A)
Due to surface tension of the oil done
clear
B)
The wick attracts the kerosene oil done
clear
C)
Of the diffusion of the oil through the wick done
clear
D)
None of the above done
clear
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question_answer39)
Water rises against gravity in a capillary tube when its one end is dipped into water because
A)
Pressure below the meniscus is less than atmospheric pressure done
clear
B)
Pressure below the meniscus is more than atmospheric pressure done
clear
C)
Capillary attracts water done
clear
D)
Of viscosity done
clear
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question_answer40)
A capillary tube of radius R is immersed in water and water rises in it to a height H. Mass of water in the capillary tube is M. If the radius of the tube is doubled, mass of water that will rise in the capillary tube will now be [RPMT 1997; RPET 1999; CPMT 2002]
A)
M done
clear
B)
2M done
clear
C)
M/2 done
clear
D)
4M done
clear
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question_answer41)
Water rises up to a height h in a capillary tube of certain diameter. This capillary tube is replaced by a similar tube of half the diameter. Now the water will rise to the height of [Kerala PMT 2005]
A)
4h done
clear
B)
3h done
clear
C)
2h done
clear
D)
H done
clear
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