GATE (Graduate Aptitude Test in Engineering) Physics: Questions 183 - 186 of 659

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Question 183

Appeared in Year: 2013

Question

MCQ▾

Consider a gas of atoms obeying Maxwell – Boltzmann statistics. The average value of over all the momenta of each of the particles (where is a constant vector and is its magnitude, is the mass of each atom, T is temperature and is Boltzmann՚s constant) is –

Choices

Choice (4)Response

a.

b.

One

c.

d.

Zero

Question 184

Appeared in Year: 2011

Question

MCQ▾

A heavy symmetrical top is rotating about its own axis of symmetry (the axis) . If and are the principal moments of inertia along and axes respectively, then –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 185

Appeared in Year: 2013

Question

MCQ▾

If Planck՚s constant were zero, then the total energy contained in a box filled with radiation of all frequencies at temperature would be –

( is Boltzmann constant and is nonzero)

Choices

Choice (4)Response

a.

Zero

b.

c.

d.

Infinite

Question 186

Appeared in Year: 2011

Question

MCQ▾

In a first order phase transition, at the transition temperature, specific heat of the system,

Choices

Choice (4)Response

a.

Remains unchanged and its entropy has finite discontinuity

b.

Has finite discontinuity and its entropy diverges.

c.

Diverges and its entropy has finite discontinuity

d.

Diverges and its entropy remains the same

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