Thermodynamics and Statistical Physics (GATE Physics): Questions 1 - 3 of 79

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Question number: 1

» Thermodynamics and Statistical Physics » Black-Body Radiation and Planck's Distribution Law

Appeared in Year: 2016

Short Answer Question▾

Write in Short

The total power emitted by a spherical black body of radius Equation at a temperature Equation is Equation . Let Equation be the total power emitted by another spherical black body of radius Equation kept at temperature Equation . The ratio Equation is Equation . (Give your answer up to two decimal places)

Question number: 2

» Thermodynamics and Statistical Physics » Probability Ensembles

Appeared in Year: 2016

Short Answer Question▾

Write in Short

The entropy Equation of a system of Equation spins, which may align either in the upward or in the downward direction, is given by Equation . Here, Equation is the Boltzmann constant. The probability of alignment in the upward direction is Equation . The value of Equation , at which the entropy is maximum is Equation (Give your answer up to one decimal place)

Question number: 3

» Thermodynamics and Statistical Physics » Macrostates and Microstates

Appeared in Year: 2015

MCQ▾

Question

Consider a system of N non – interacting spin Equation particles, each having a magnetic moment Equation , is in a magnetic field Equation . If Equation is the total energy of the system, the number of accessible microstates Equation is given by,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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