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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.

  1.77 mm.
 1.32 mm.
 0.88 mm.
 0.

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Electromagnetic Field Theory
Coulombs law for the force between electric charges most closely resembles with

 Newtons law of motion.
 Law of conservation of energy.
 Newtons law of gravitation.
 Gauss theorem.

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Electromagnetic Field Theory
In above question no. 9, the average force on the core to reduce the air gap will be

 6664.8 N.
 832.29 N.
 3332.47 N.
 1666.22 N.

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Electromagnetic Field Theory
In case of surface waves the field strength at a point is directly proportional to

Wave frequency
Distance of the point from the antenna
Current of the antenna
Antenna height

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Electromagnetic Field Theory
For a line characteristic impedance zo terminated is load zo/3, the reflection coefficient is

 1/3.
 – 1/3.
 2/3.
  – ½.

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Electromagnetic Field Theory
If a and b are the dimensions of waveguide then

a = 3b
a = b/4
a = b
a = 2b

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