A 20cm long capillary tube is dipped in water. The water rises up to 8cm. If the entire arrangement is put in a freely falling elevator, the length of water column in the capillary tube will be
(a) 8cm
(b) 6cm
(c) 10cm
(d) 20cm.
1 Answers
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A 20cm long capillary tube is dipped in water. The water rises up to 8cm.
(b) : In a freely falling elevator g = 0 Water will rise to the full length i.e., 20cm to tube.
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Water 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
The correct answer is (b) 10√2 cm Explanation: When the tube is inclined, the vertical rise remains the same. So the water in the inclined tube rises to 10*sec45° =10√2 cm.
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A 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 correct answer is (d) 20 cm. Explanation: The rise in a capillary tube is given as h = 2S.cosθ/rρg When the entire arrangement is in a freely falling elevator, the effective...
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When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary.
(c) The surface tension may be zero. (d) The contact angle may be 90°. Explanation: The rise in a capillary tube is given as, h = 2S.cosθ/rρg The capillary tube has a certain...
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A cylindrical tube, open at both ends, has a fundamental frequency v. The tube is dipped vertically in water so that ,
The correct answer is (c) v EXPLANATION: When a tube of length L open at both ends has a fundamental frequency ν, then v = V/2L where V is the velocity of...
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A 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 correct answer is (4) Explanation: The rise in a capillary tube is given as h = 2S.cosθ/rρg When the entire arrangement is in a freely falling elevator, the effective g =...
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One end of a metal rod is dipped in boiling water and the other is dipped in melting ice.
(d) The state of the rod does not change after steady state is reached.
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The lower end of a capillary tube is immersed in mercury. The level of mercury in the tube is found to be 2 cm below the outer level.
Rise/depression = 2S.cosθ/rρg For mercury -0.02 = 2S'.cosθ/rρ'g ------- (i) For water rise, h = 2S.cos0°/rρg ------- (ii) Dividing (ii) by (i) h/0.02 = -Sρ'/(S'*cosθ*ρ) →h = -0.02*Sρ'/(1000S'.cosθ) S' =7.5 x 10⁻² N/m. S =...
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A capillary tube of radius 0.50 mm is dipped vertically in a pot of water. Find the difference between the pressure of the water in the tube 5.0 cm
P =2T/r P = F/r
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A uniform capillary tube of inner radius r is dipped vertically into a beaker filled with water
solution (A,C) h = (2σcosθ)/(rρgeff)(ρ is density of water)
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