Properties of Solids & Liquids-Surface Energy and Surface Tension (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 4 of 23

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Question number: 1

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

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MCQ▾

Question

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. Its radius will be

Choices

Choice (4) Response

a.

4 cm

b.

20 cm

c.

4.5 cm

d.

5 cm

Question number: 2

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

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 3

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

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MCQ▾

Question

Two parallel glass plates are dipped partly in the liquid of density ρ keeping them vertical. If the distance between the plates is V, surface tension for liquids is T and angle of contact is θ, then rise of liquid between the plates due to capillary will be

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 4

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

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Assertion-Reason▾

Question

Assertion (Ꭺ)

The velocity increases, when water flowing in broader pipe enters a narrow pipe.

Reason (Ꭱ)

According to equation of continuity, product of area and velocity is constant.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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