# Thermodynamics and Statistical Physics-Classical and Aquantum Statistics [GATE (Graduate Aptitude Test in Engineering) Physics]: Questions 1 - 5 of 11

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## Question 1

Appeared in Year: 2014

### Question MCQ▾

For a gas under isothermal conditions, its pressure P varies with volume V and . The bulk module B is proportional to –

### Choices

Choice (4)Response

a.

b.

c.

d.

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## Question 2

Appeared in Year: 2012

### Question MCQ▾

At a certain temperature T, the average speed of nitrogen molecules in air is found to be . The most probable and the root mean square speeds of the molecules are, respectively –

### Choices

Choice (4)Response

a.

b.

c.

d.

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## Question 3

Appeared in Year: 2012

### Question MCQ▾

Which one of the following cannot be explained by considering a harmonic approximation for the lattice vibrations in solids?

### Choices

Choice (4)Response

a.

Thermal expansion

b.

Dulong – Petit law

c.

Debye՚s law

d.

Optical branches in lattices

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## Question 4

Appeared in Year: 2012

### Question MCQ▾

A classical gas of molecules, each of mass , is in thermal equilibrium at the absolute temperature, . The velocity component of the molecules along the Cartesian axes are and . The mean value of is –

### Choices

Choice (4)Response

a.

b.

c.

d.

Edit

## Question 5

Appeared in Year: 2011

### Question MCQ▾

If the isothermal compressibility of a solid is , the pressure required to increase its density by is approximately

### Choices

Choice (4)Response

a.

b.

c.

d.

Edit