GATE (Graduate Aptitude Test in Engineering) Physics: Questions 139 - 142 of 659

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Question 139

Appeared in Year: 2012

Question

MCQ▾

The electric and the magnetic fields and , respectively corresponding to the scalar potential and vector potential are –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 140

Appeared in Year: 2012

Question

MCQ▾

Two infinitely extended homogeneous isotropic dielectric media (medium – 1 and medium – 2 with dielectric constant and , respectively) meet at the plane as shown in the figure. A uniform electric field exists everywhere. For , the electric field is given by . The interface separating the two media is charge free. The electric displacement vector in the medium – 2 is given by,

Plane in Which Two Media Meet

Choices

Choice (4)Response

a.

b.

c.

d.

Question 141

Appeared in Year: 2012

Question

MCQ▾

Deuteron has only one bound state with spin parity , isospin and electric quadrupole moment . These data suggest that the nuclear forces are having –

Choices

Choice (4)Response

a.

Only spin and isospin dependence

b.

No spin dependence and no tensor components

c.

Spin dependence along with tensor components

d.

Spin dependence but no tensor components

Question 142

Appeared in Year: 2012

Question

MCQ▾

The total energy, of an ideal non – relativistic Fermi gas in three in three dimensions is given by ; where, is the number of particles and V is the volume of the gas. Identify the correct equation of state (P being the pressure) –

Choices

Choice (4)Response

a.

b.

c.

d.

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