CSIR Physical Sciences: Questions 196 - 198 of 401

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Question number: 196

» Quantum Mechanics » Spin-Statistics Connection

Appeared in Year: 2011

MCQ▾

Question

The Hamiltonian of an electron in a constant magnetic field Equation is given by Equation where Equation is a positive constant and Equation denotes the Pauli matrices. Let Equation and Equation be the Equation unit matrix. Then the operator Equation simplifies to – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 197

» Thermodynamic and Statistical Physics » Phase Space

Appeared in Year: 2011

MCQ▾

Question

Consider the transition of liquid water to steam as water boils at a temperature of 1000 C under a pressure of 1 atmosphere. Which one of the following quantities does not change discontinuously at the transition? - (June)

Choices

Choice (4) Response

a.

The internal energy

b.

The entropy

c.

The specific volume

d.

The Gibbs free energy

Question number: 198

» Nuclear and Particle Physics » Semiempirical Mass Formula

Appeared in Year: 2014

MCQ▾

Question

If the binding energy B of a nucleus (mass number A and charge Z) is given by,

Equation ; where Equation , then the Z for the most stable isobar for a nucleus with Equation is –

(December)

Choices

Choice (4) Response

a.

68

b.

92

c.

84

d.

72

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