GATE (Graduate Aptitude Test in Engineering) Physics: Questions 147 - 150 of 659

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Question 147

Appeared in Year: 2012

Question

MCQ▾

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.

Question 148

Appeared in Year: 2012

Question

MCQ▾

The ground state wave function for the hydrogen atom is given by , where is the Bohr radius. The plot of the radial probability density, for the hydrogen atom in the ground state is –

Choices

Choice (4)Response

a.

The Plot of the Radial Probability Density Choice: A

b.

The Plot of the Radial Probability Density Choice: B

c.

The Plot of the Radial Probability Density Choice: C

d.

The Plot of the Radial Probability Density Choice: D

Question 149

Appeared in Year: 2012

Question

MCQ▾

A plane electromagnetic wave traveling in free space is incident normally on a glass plate of refractive index . If there is no absorption by the glass, its reflectivity is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 150

Appeared in Year: 2012

Question

MCQ▾

Consider the wavefunction for a ferromagnetic system consisting of two spin – half particles. The spatial part of the wavefunction is given by –

Where, and are single particle states.

The spin part of of the wavefunction with spin states and should be –

Choices

Choice (4)Response

a.

b.

c.

d.

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