Electromagnetic Theory-Electromagnetic Waves in Free Space (CSIR Physical Sciences): Questions 1 - 4 of 4

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Question number: 1

» Electromagnetic Theory » Electromagnetic Waves in Free Space

Appeared in Year: 2014

MCQ▾

Question

A light source is switched on and off at a constant frequency f . An observer moving with a velocity u with respect to the light source will observe the frequency of the switching to be – (June)

Choices

Choice (4) Response
a.

f(1u2c2)

b.

f(1u2c2)12

c.

f(1u2c2)1

d.

f(1u2c2)12

Question number: 2

» Electromagnetic Theory » Electromagnetic Waves in Free Space

Appeared in Year: 2011

MCQ▾

Question

A plane electromagnetic wave is propagating in a lossless dielectric. The electric field is given by E(x,y,z,t)=E0(x^+Az^)exp[ik0{ct+(x+3z)}] , where c is the speed of light in vacuum, E0 , A and k0 are constant and x^ and z^ are unit vectors along the x and z – axes. The relative dielectric constant of the medium, εr and the constant A are – (June)

Choices

Choice (4) Response
a.

εr=4andA=+13

b.

εr=4andA=3

c.

εr=4andA=3

d.

εr=4andA=13

Passage

The magnetic field of the TE11 mode of a rectangular waveguide of dimensions a×b as shows in the figure is given by Hz=H0cos(0.3πx)cos(0.4πy) , where x and y are in cm.

 The magnetic field of a mode of a rectangular waveguide

the Magnetic Field of a Mode of a Rectangular Waveguide

In figure the magnetic field of a mode of a rectangular waveguide is shown.

Question number: 3 (1 of 2 Based on Passage) Show Passage

» Electromagnetic Theory » Electromagnetic Waves in Free Space

MCQ▾

Question

The dimensions of the waveguide are –

Choices

Choice (4) Response
a.

a=0.80cm,b=0.60cm

b.

a=1.66cm,b=1.25cm

c.

a=3.33cm,b=2.50cm

d.

a=0.40cm,b=0.30cm

Question number: 4 (2 of 2 Based on Passage) Show Passage

» Electromagnetic Theory » Electromagnetic Waves in Free Space

MCQ▾

Question

The entire range of frequencies f for which the TE11 mode will propagate is:

Choices

Choice (4) Response
a.

7.5GHz<f<9.0GHz

b.

6.0GHz<f<7.5GHz

c.

7.5GHz<f<12.0GHz

d.

7.5GHz<f

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