Properties of Solids & Liquids-Surface Energy and Surface Tension (NEET Physics): Questions 15 - 19 of 23

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Question number: 15

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

MCQ▾

Question

A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D > > d). If it is burning at the rate of 2 cm/hour then the top of the candle will,

Choices

Choice (4) Response
a.

Fall at the rate of 2 cm/hour

b.

Fall at the rate of 1 cm/hour

c.

Remain at the same height

d.

Go up the rate of 1 cm/hour

Question number: 16

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

MCQ▾

Question

When a body falls in air, the resistance of air depends to a rat extent on the shape of the body, 3 different shapes (1.5 cm cube, 2.3 cm cube and 3.1 cm cube). Identify the combination of air resistances which truly represents the physical situation. (The cross sectional areas are the same).

Choices

Choice (4) Response
a.

3 < 2 < 1

b.

2 < 3 < 1

c.

3 < 1 < 2

d.

1 < 2 < 3

Question number: 17

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

MCQ▾

Question

In a surface tension experiment with a capillary tube water rises up to 0.1 m . If the same experiment is repeated on an artificial satellite, which is revolving around the earth, water will rise in the capillary tube up to heights of,

Choices

Choice (4) Response
a.

0.98 m

b.

0.1 m

c.

Full length of the capillary tube

d.

0.2 m

Question number: 18

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

MCQ▾

Question

Two soap bubbles of radii r 1 and r 2 equal to 8 cm and 9 cm are touching each other over a common surface S 1 S 2. Its radius will be

Choices

Choice (4) Response
a.

45 cm

b.

58 cm

c.

20 cm

d.

72 cm

Question number: 19

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

MCQ▾

Question

Radius of a capillary tube is 4 × 10 -3 m. A liquid of weight 5.20 × 10 -4 N may remain in the capillary tube then the surface tension of liquid will be

Choices

Choice (4) Response
a.

2.3 × 10 -2 N/m

b.

20 N/m

c.

2.0 × 10 -2 N/m

d.

20 × 10 -3 N/m

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