Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 7

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Water rises in a capillary tube to a height $h$ . It will rise to a height more than $h$

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Important Questions on Viscosity and Surface Tension

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 9

At critical temperature, the surface tension of a liquid :

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 10

The force required to drag a circular flat plate of radius

5 cm

just touching the surface of water is (ST of water is

75

dynelcm):

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 11

10 cm

long wire is placed horizontally on the surface of the water and is gently pulled up with a force of

(2 \times 10^{- 2}) N

to keep the wire in equilibrium. The surface tension of water in

N m^{- 1}

is:

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 12

The work done in increasing the size of a rectangular soap film with dimensions

8 c m \times 3.75

cm to

10 c m \times 6 c m

is

2 \times 10^{- 4}

J. The surface tension of the film in

N m^{- 1}

is

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 14

A thin metal disc of radius

r

floats on water surface and bends the water surface downwards along the perimeter making an angle

θ

with vertical edge of the disc. If the disc displaces a weight of water

W

and surface tension of water is

T

, then the weight of metal disc is

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 15

A capillary tube of the 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, the mass of water that will rise in the capillary tube will now be

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 16

Surface tension of liquid is

5 {Nm}^{- 1}

. If a thin film of area

0.02 m^{2}

is made in a ring then the surface energy will be :

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Alpha Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise-1>Q 17

Water rises in a vertical capillary tube up to a length of $10 cm$ . If the tube is inclined at $45 °$ , the length of water risen in the tube will be,