GATE (Graduate Aptitude Test in Engineering) Physics: Questions 156 - 159 of 659

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Passage

In a hydrogen atom, consider that the electromagnetic charge is uniformly distributed in a spherical volume of radius around the proton. The atom is placed in a uniform electric field . Assume that the spherical distribution of the negative charge remains undistorted under the electric field.

Question 156 (2 of 2 Based on Passage)

Appeared in Year: 2012

Question

MCQ▾

In the equilibrium condition, the separation between the positive and negative charge centers is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 157

Appeared in Year: 2012

Question

MCQ▾

A classical gas of molecules, each of mass , is in thermal equilibrium at the absolute temperature, . The velocity component of the molecules along the Cartesian axes are and . The mean value of is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 158

Appeared in Year: 2012

Question

MCQ▾

A simple cubic crystal with lattice parameter undergoes transition into a tetragonal structure with lattice parameters and , below a certain temperature. The ratio of the interplanar spacing of planes for the cubic and the tetragonal structures is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 159

Appeared in Year: 2012

Question

MCQ▾

A particle is constrained to move in a truncated harmonic potential well as shown in the figure. Which one of the following statements is correct?

Truncated Harmonic Potential Well

Choices

Choice (4)Response

a.

The parity of the ground state is even

b.

The parity of the first excited state is even

c.

The ground state energy is

d.

The first excited state energy is

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