Thermodynamic and Statistical Physics (CSIR (Council of Scientific & Industrial Research) Physical Sciences): Questions 44 - 46 of 56

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Question number: 44

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2012

MCQ▾

Question

The free energy difference between the superconducting and the normal states of a material is given by, Equation where Equation is an order parameter and Equation and Equation are constants such that Equation in the normal and Equation in the superconducting state, while Equation always. The minimum value of Equation is – (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 45

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2011

MCQ▾

Question

Gas molecules of mass ‘m’ are confined in a cylinder of radius R and height L (With R > > L) kept vertically in the Earth’s gravitational field. The average energy of the gas at low temperature (such that Equation ) is given by, (December)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 46

» Thermodynamic and Statistical Physics » Classical and Quantum Statistics

Appeared in Year: 2011

MCQ▾

Question

Consider a system of N non – interacting spins, each of which has classical magnetic moment of magnitude Equation . The Hamiltonian of this system in an external magnetic field Equation is Equation

where Equation is the magnetic moment of the Equation spin. The magnetization per spin at temperature T is: (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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