GATE (Graduate Aptitude Test in Engineering) Physics: Questions 145 - 148 of 659

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Question number: 145

» Nuclear and Particle Physics » Nuclear Binding Energy

Appeared in Year: 2012

MCQ▾

Question

Total binding energies of are , and , respectively. The energy gap between and neutron shells for the nuclei whose mass number is close to 16, is –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 146

» Quantum Mechanics » Time-Independent Perturbation Theory

Appeared in Year: 2012

MCQ▾

Question

Consider a system in the unperturbed state described by the Hamiltonian, . The system is subjected to a perturbation of the form where . The energy eigenvalues of the perturbed system using the first order perturbation approximation are –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 147

» Thermodynamics and Statistical Physics » Classical and Aquantum Statistics

Appeared in Year: 2012

MCQ▾

Question

Which one of the following cannot be explained by considering a harmonic approximation for the lattice vibrations in solids?

Choices

Choice (4) Response

a.

Thermal expansion

b.

Optical branches in lattices

c.

Debye’s law

d.

Dulong – Petit law

Question number: 148

» Electronics » Semiconductor Devices

Appeared in Year: 2012

MCQ▾

Question

A Ge semiconductor is doped with acceptor impurity concentration of . For the given hole mobility of the resistivity of this material is –

Choices

Choice (4) Response

a.

b.

c.

d.

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