Thermodynamics and Statistical Physics-Calculation of Thermodynemic Quantities (GATE Physics): Questions 1 - 2 of 4

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Question number: 1

» Thermodynamics and Statistical Physics » Calculation of Thermodynemic Quantities

Appeared in Year: 2016

Short Answer Question▾

Write in Short

N atoms of an ideal gas are enclosed in a container of volume V . The volume of the container is changed to 4V , while keeping the total energy constant. The change in the entropy of the gas, in units of NkBln2 , is _ , where kB is the Boltzmann constant.

Question number: 2

» Thermodynamics and Statistical Physics » Calculation of Thermodynemic Quantities

Appeared in Year: 2012

MCQ▾

Question

Inverse susceptibility (1χ) as a function of temperature, T for a material undergoing paramagnetic to ferromagnetic transition is given in the figure, where O is the origin. The values of the Curie constant, C , and the Weiss molecular field constant, λ , in CGS units, are –

Segment f Segment f: Segment [C, D] Segment g Segment g: Segment [E, F] Segment h Segment h: Segment [F, G] Vector u Vector u: Vector [A, B] Vector u Vector u: Vector [A, B] Vector v Vector v: Vector [H, I] Vector v Vector v: Vector [H, I] Vector w Vector w: Vector [J, K] Vector w Vector w: Vector [J, K] Point F Point F: Point on fPoint F Point F: Point on f/frac1? text1 = “/frac1? “/frac1? text1 = “/frac1? “/frac1? text1 = “/frac1? “O text1_1 = “O”T text1_2 = “T”-2×10^4 text1_3 = “-2×10^4”-2×10^4 text1_3 = “-2×10^4”-2×10^4 text1_3 = “-2×10^4”-2×10^4 text1_3 = “-2×10^4”-2×10^4 text1_3 = “-2×10^4”-2×10^4 text1_3 = “-2×10^4” (CGS unit) text1_4 = ” (CGS unit) “600 K text1_5 = “600 K”600 K text1_5 = “600 K”600 K text1_5 = “600 K”600 K text1_5 = “600 K”

Inverse Susceptibility vs Temperature

In figure inverse susceptibility as a function of temperature for a material undergoing paramagnetic to ferromagnetic transition is given.

Choices

Choice (4) Response

a.

C=3×102,λ=5×105

b.

C=5×105,λ=3×102

c.

C=2×104,λ=3×102

d.

C=3×102,λ=2×104

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