Properties of Solids & Liquids (AIIMS Physics): Questions 41 - 45 of 48

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Question number: 41

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

A solid sphere of diameter D and density 8gcm3 has a spherical cavity of diameter d inside it. If it just floats completely immersed in a liquid of density 2gcm3 , then the ratio Dd is –

Choices

Choice (4) Response

a.

23

b.

233

c.

43

d.

433

Question number: 42

» Properties of Solids & Liquids » Viscosity

MCQ▾

Question

The rate of flow of a liquid through a capillary tube of radius r is V when the pressure difference across the two ends of the capillary is P. If pressure is increased by 6P and radius is reduced to r3 then the rate of flow becomes,

Choices

Choice (4) Response

a.

2V27

b.

V9

c.

V27

d.

2V9

Question number: 43

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

A wire has length 1.5 m and radius 1.5 mm and another wire has length 4.5 m and radius 4.5 mm. Both are fixed at one end and twisted at other end. Calculate the ratio of couples required to twist the wires through the same angle. The wires are made of the same material.

Choices

Choice (4) Response

a.

19

b.

9

c.

27

d.

127

Question number: 44

» Properties of Solids & Liquids » Viscosity

MCQ▾

Question

A water drop of mass m=500mg is introduced between two plates with separation d=0.06mm. Calculate the force of attraction between the plates.

Choices

Choice (4) Response

a.

16.22N

b.

19.44N

c.

21.12N

d.

17.33N

Question number: 45

» Properties of Solids & Liquids » Pressure Due to a Fluid Column

MCQ▾

Question

A common hydrometer, which is graduated from 0 to 10 downwards, reads zero when floating in water and 10 when floating in liquid of specific gravity 1.4. In an unknown liquid it reads 7, the specific gravity of the unknown liquid is –

Choices

Choice (4) Response

a.

1.4

b.

1.3

c.

1.2

d.

1.6

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