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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.
 0.
 0.88 mm.
 1.32 mm.

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non-magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The current of 3 A will be

 37.68 mH.
 37.68 µH.
 113.04 µH.
 113.04 mH.

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

 electric field.
 protons.
 electrons.
 neutrons.

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Electromagnetic Field Theory
1 Maxwell is the same as

 10-8 weber.
 104 weber.
 10-8 weber.
 10-4 weber.

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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 600.
 150.
 300.
 450.

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Passive satellite
Orbiting satellite
Active satellite
Geostationary satellite

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