Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 27

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Due to capillary action, a liquid will rise in a tube, if the angle of contact is

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Important Questions on Viscosity and Surface Tension

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 28

A few droplets merge with each other to form a large droplet. In this process,

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 29

Two capillary tubes of the same diameter are put vertically, one each in two liquids whose relative densities are

0.8

and

0.6

and surface tensions are

60 dyne {cm}^{- 1}

and

50 dyne {cm}^{- 1}

, respectively. Ratio of heights of liquids in the two tubes is,

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 30

The property utilised in the manufacture of lead shots is

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 31

Surface tension of a liquid is

5 N m^{- 1}

. If its thin film is made in a ring of area

0.02 m^{2}

, then its surface energy will be,

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 32

If one end of capillary tube is dipped into water, then water rises up to

3 cm

. If the surface tension of water is

75 \times 10^{- 3} N m^{- 1}

, then the diameter of capillary tube will be,

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 33

If the surface tension of a liquid is

T

and its surface area is increased by

A

, then the surface energy of that surface will be increased by,

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 34

Two soap bubbles of radii $r_{1} and r_{2}$ equal to $4 cm and 5 cm$ are touching each other over a common surface $S_{1} S_{2}$ (shown in figure). Its radius will be,

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Beta Question Bank for Medical: Physics>Chapter 14 - Viscosity and Surface Tension>Exercise (Conceptual Questions)>Q 35

The radius of a soap bubble is

r

. The surface tension of soap solution is

T

. Keeping the temperature constant, if the radius of the soap bubble is doubled, then the energy necessary for this will be,