Thermodynamic and Statistical Physics-Ising Model (CSIR Physical Sciences): Questions 1 - 3 of 3

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Question number: 1

» Thermodynamic and Statistical Physics » Ising Model

Appeared in Year: 2013

MCQ▾

Question

Consider a system of two Ising spins and taking values with interaction energy given by , when it is in thermal equilibrium at temperature T. For large T, the average energy of the system varies as , with C given by,

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Choice (4) Response

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Question number: 2

» Thermodynamic and Statistical Physics » Ising Model

Appeared in Year: 2012

MCQ▾

Question

Consider a one – dimensional Ising model with N spins, at very low temperature when almost all the spins are aligned parallel to each other. There will be a few spin flips with each flip costing an energy . In a configuration with spin flips, the energy of the system is and the number of configuration is ; varies from 0 to N. The partition function is – (December)

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Choice (4) Response

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d.

Question number: 3

» Thermodynamic and Statistical Physics » Ising Model

Appeared in Year: 2011

MCQ▾

Question

A one – dimensional chain consists of a set of N rods each of length . When stretched by a load, each rod can align either parallel or perpendicular to the length of the chain. The energy of a rod is when aligned parallel to the length of the chain and is when perpendicular to it. When the chain is in thermal equilibrium at temperature T, its average length is – (December)

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Choice (4) Response

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c.

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