Electromagnetic Theory (GATE Physics): Questions 12 - 16 of 36

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Question number: 12

» Electromagnetic Theory » Energy and Momentum of Electromagnetic Waves

Appeared in Year: 2014

Short Answer Question▾

Write in Short

The intensity of a laser in free space is 150mWm2 . The corresponding amplitude of the electric field of the laser is _Vm . (ε0=8.854×1012C2Nm2)

Question number: 13

» Electromagnetic Theory » Interference

Appeared in Year: 2014

MCQ▾

Question

In an interference pattern formed by two coherent sources, the maximum and the minimum of the intensities are 9I0 and I0 , respectively. The intensities of the individual waves are –

Choices

Choice (4) Response

a.

5I0and4I0

b.

3I0andI0

c.

9I0andI0

d.

4I0andI0

Question number: 14

» Electromagnetic Theory » Diffraction and Polarization

Appeared in Year: 2015

Short Answer Question▾

Write in Short

A point charge is placed between two semi – infinite conducting plates which are inclined at an angle of 300 with respect to each other. The number of image charge is ________.

Question number: 15

» Electromagnetic Theory » Diffraction and Polarization

Appeared in Year: 2014

MCQ▾

Question

An unpolarized light wave is incident from air on a glass surface at the Brewster angle. The angle between the reflected and the refracted wave is –

Choices

Choice (4) Response

a.

900

b.

450

c.

1200

d.

00

Question number: 16

» Electromagnetic Theory » Scalar and Vector Potentials

Appeared in Year: 2016

MCQ▾

Question

The direction of f for a scalar field f(x,y,z)=12x2xy+12z2 at the point P(1, 1,2) is –

Choices

Choice (4) Response

a.

j^2k^5

b.

j^2k^5

c.

j^+2k^5

d.

j^+2k^5

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