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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following represents ohms law

All of these
 J = σE
 I = GV
 V = RI

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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 inductance of the coil corresponding to a magnetizing current of 6 A will be

 3.768 μH.
 37.68 μH.
 1.1304 μH.
  113.04 μH.

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Electromagnetic Field Theory
Which antenna is a wideband antenna?

None of these
Folded dipole
Marconi antenna
Hertz antenna

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Electromagnetic Field Theory
An electric field on a place described by its potential V = 20 (r -1 + r-2) where r is the distance from the source. The field is due to

 A monopole.
 A quardra pole.
 Both of A and B.
 A dipole.

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Electromagnetic Field Theory
Two coupled coils with L1 = L2 = 0.6 H have a coupling coefficient of K = 0.8. The turns ratio N1/N2 is

 0.5.
 1.
 4.
 2.

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Electromagnetic Field Theory
The right hand rule for determining the direction of the induced EMF was introduced by

 Lenz
 Maxwell
 Fleming
 Faraday

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