Properties of Solids & Liquids (NEET Physics): Questions 23 - 25 of 188

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Question number: 23

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

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.

2Tcosθbdg

b.

Tcosθbd

c.

2Tbdcosθ

d.

Tcosθbdg

Question number: 24

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

A piece of metal weight 40 gm in air, when it is immersed in the liquid of specific gravity 1.24 at 27 °C it weighs 25 gm. When the temperature of liquid is raised to 42°C the metal piece weighs 20gm, specific gravity of the liquid at 42°C is 1.20, then the linear expansion of the metal will be

Choices

Choice (4) Response
a.

2.6 × 10 -3 / o C

b.

8.3 × 10 -3 /°C

c.

3.316 × 10 -2 /°C

d. Question does not provide sufficient data or is vague

Question number: 25

» Properties of Solids & Liquids » Terminal Velocity

MCQ▾

Question

A large open tank has two holes in the wall. One is a square hole of side L at a depth y from the top and the other is a circular hole of radius if at a depth 5y from the top. When the tank is completely filled with water the quantities of water flowing out per second from both the holes are the same. Then R is equal to

Choices

Choice (4) Response
a.

L

b.

L2π

c.

L2.23π

d.

2πL

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