Properties of Solids & Liquids (NEET Physics): Questions 162 - 166 of 188

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Question number: 162

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

When fluids are heated from the bottom, convection currents are produced because

Choices

Choice (4) Response

a.

Heated fluid becomes less dense than the cold fluid above it

b.

Molecular motion of fluid becomes aligned

c.

Heated fluid becomes more dense than the cold fluid above it

d.

Molecular collisions take place within the fluid

Question number: 163

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

For a given material, the Young’s modulus is 2.4 times that of rigidity modulus. Its Poisson’s ratio is

Choices

Choice (4) Response

a.

2

b.

0.2

c.

1.02

d.

1.2

Question number: 164

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The ratio of radii of two wires of same material is 4: 1. If these wires are stretched by equal forces, then the ratio of stresses produced in them will be

Choices

Choice (4) Response

a.

1: 4

b.

1: 16

c.

2: 1

d.

4: 1

Question number: 165

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

A constant volume gas thermometer shows pressure reading of 50 cm and 90 cm of mercury at 0°C and 100°C respectively. When the pressure reading is 60 cm of mercury, the temperature is

Choices

Choice (4) Response

a.

40°C

b.

25°C

c.

15°C

d.

12.5°C

Question number: 166

» Properties of Solids & Liquids » Latent Heat

MCQ▾

Question

A bullet moving with a uniform velocity v, stops sudden after hitting the target and the whole mass melts be m, specific heat S, initial temperature 25°C, melting point 475 °C and the latent heat L. Then v is given by

Choices

Choice (4) Response

a.

mS(47525)+mL=12mv2J

b.

mS(47525)+mL=12mv2J

c.

mS(47525) mL=12mv2J

d.

mL=mS(47525)+12mv2J

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