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Electromagnetic Field Theory

Electromagnetic Field Theory
The ability of charged bodies to exert force on one another is attributed to the existence of

 protons.
 electrons.
 electric field.
 neutrons.

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Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?

 Grad div A.
 Div grad V.
 Div curl A.
 Curl curl A.

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Electromagnetic Field Theory
A plane wave magnetic field is represented by Bx = cos(y – ct). The electric and magnetic fields will be zero in the direction

 None of these.
 Ex = Ey = 0, By = Bz = 0.
 Ey = Ez = 0, By = Bz = 0.
 Ex = Ey = 0, Bx = By = 0.

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Electromagnetic Field Theory
When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called

Scattering
Absorption
Polarisation
Dispersion

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Electromagnetic Field Theory
The frequency range for satellite communication is

300 to 3000 kHz
3 to 30 kHz
30000 to 300000 MHz
3000 to 30000 MHz

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Electromagnetic Field Theory
If the static magnetic flux density is B, then

 Curl of B = 0.
 Curl of B = J.
  Divergence of B = 0.
 Divergence of B = J.

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MORE MCQ ON Electromagnetic Field Theory

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