The figure shows a capillary tube of radius r dipped into water. If the atmospheric pressure is P0, the pressure at point A is pressure at point A is
1. \(P_{0}\)
2. \(P_{0}+\frac{2 S}{r}\)
3. \(P_{0}-\frac{2 S}{r}\)
4. \(P_{0}-\frac{4 S}{r}\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe excess pressure inside a soap bubble is twice the excess pressure inside a second soap bubble. The volume of the first bubble is n times the volume of the second where n is
1. 4
2. 2
3. 1
4. 0.125
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following graphs may represent the relation between the capillary rise h and the radius r of the capillary?
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWater rises in a vertical capillary tube upto a length of 10 cm. If the tube is inclined at 45°, the length of water risen in the tube will be
1. 10 cm
2. 10\(\sqrt2\)cm
3. 10/\(\sqrt2\)cm
4. none of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 20 cm long capillary tube is dipped in water. The water rises up to 8 cm. If the entire arrangement is put in a freely falling elevator, the length of water column in the capillary tube will be
1. 8 cm
2. 6 cm
3. 10 cm
4. 20 cm
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe rise of a liquid in a capillary tube depends on
(a) the material
(b) the length
(c) the outer radius
(d) the inner radius of the tube
Choose the correct option:
1. (a) and (b)
2. (a), (b) and (c)
3. (a), (b) and (d)
4. All of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary.
a. | the surface tension of the liquid must be zero. |
b. | the contact angle must be \(90^\circ.\) |
c. | the surface tension may be zero. |
d. | the contact angle may be \(90^\circ.\) |
Choose the correct option:
1. | (a) and (b) |
2. | (b) and (c) |
3. | (c) and (d) |
4. | all of these |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology