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Electromagnetic Field Theory

Electromagnetic Field Theory
An infinite non conducting sheet of charge has σ of 10-7 c/m3. Equipotential surface for a potential of 10 volts is.

 1.32 mm.
 0.
  1.77 mm.
 0.88 mm.

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Electromagnetic Field Theory
Which of following can induce the maximum induced voltage ?

 20 amp dc.
 1 amp dc.
 1 amp 100 Hz.
 1 amp 1 Hz.

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Electromagnetic Field Theory
The magnetic field required to reduce the residual magnetism to zero is called

 Retentivity.
 Hysteresis.
 Coercivity.
 Saturation magnetism.

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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

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

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Electromagnetic Field Theory
The skip distance is the maximum distance upto which ionospheric reflection is possible.

False
True

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Electromagnetic Field Theory
Tropospheric scatter propagation is not subject to any fading.

True
False

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