Electromagnetic Theory [GATE (Graduate Aptitude Test in Engineering) Physics]: Questions 67 - 70 of 88

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Question 67

Electromagnetic Theory

Appeared in Year: 2008

Question

MCQ▾

A parallel plate capacitor is being discharged. What is the direction of the energy flow in terms of the Poynting vector in the space between the plates?

A Parallel Plate Capacitor in Three Dimensions

Choices

Choice (4)Response

a.

Radially inward

b.

Radially outward

c.

Along the wire in the positive axis

d.

Circumferential

Question 68

Electromagnetic Theory

Appeared in Year: 2007

Question

MCQ▾

An electromagnetic wave with is traveling in free space and crosses a disc of radius placed perpendicular to the axis. If , the average power, in Watt, crossing the disc along the direction is –

Choices

Choice (4)Response

a.

120

b.

60

c.

30

d.

270

Question 69

Appeared in Year: 2007

Question

MCQ▾

A charged capacitor (C) is connected in series with an inductor (L) . When the displacement current reduces to zero, the energy of the LC circuit is –

Choices

Choice (4)Response

a.

Stored entirely in its electric field

b.

Radiated out of the circuit.

c.

Stored entirely in its magnetic field

d.

Distributed equally among its electric and magnetic fields

Question 70

Electromagnetic Theory

Appeared in Year: 2008

Question

MCQ▾

A nonrelativistic charged particle moves along the positive axis with a constant positive acceleration . The particle is at the origin at . Radiation is observed at at a distant point on the axis. Which one of the following statement is correct?

Choices

Choice (4)Response

a.

The radiation is plane polarized with polarization parallel to the plane along a line inclined to the axis

b.

The radiation is unpolarized

c.

The radiation is elliptically polarized

d.

The radiation is plane polarized with polarization parallel to the axis

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