GATE (Graduate Aptitude Test in Engineering) Physics: Questions 331 - 336 of 659

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Question 331

Appeared in Year: 2009

Question

MCQ▾

Which one of the following current densities, , can generate the magnetic vector potential ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 332

Appeared in Year: 2009

Question

MCQ▾

The magnetic field inside a long solid cylindrical conductor of radius is, , where . What is the total current in the conductor?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 333

Appeared in Year: 2009

Question

MCQ▾

The value of the contour integral, , for a circle of radius with centre at the origin is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 334

Appeared in Year: 2009

Question

MCQ▾

In a non – conducting medium characterized by and conductivity , the electric field is given by . The magnetic field, , is given by –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 335

Appeared in Year: 2009

Question

MCQ▾

represent the Pauli spin matrices. Which one of the following is NOT true?

Choices

Choice (4)Response

a.

b.

c.

d.

The eigenvalues of are

Question 336

Appeared in Year: 2009

Question

MCQ▾

Five energy levels of a system including the ground state are shown below. Their lifetimes and the allowed electric dipole transitions are also marked.

Energy Level Diagram

Which one of the following transition is the most suitable for a continuous wave (CW) laser?

Choices

Choice (4)Response

a.

b.

c.

d.

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