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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following represents ohms law

 I = GV
 V = RI
 J = σE
All of these

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Electromagnetic Field Theory
The tubes of force within the magnetic material are known as

 tubes of indication.
 magnetic flux.
 lines of force.
 none of them.

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

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Electromagnetic Field Theory
In a dielectric material an applied field in x direction Ex = 5 v/m gives a polarization of px = 3/10π ux nc/m2. The susceptibility of the material is

 Infinity.
 Zero.
 4.32.
  2.16.

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Electromagnetic Field Theory
The work done by a force F = 4un - 3uy + 2uz N in giving a 1nC charge a displacement of (10 ux + 2uy - 7uz) m is

 20 nj.
 100 nj.
 60 nj.
 40 nj.

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Electromagnetic Field Theory
In an impedance smith chart, a clockwise movement along a constant resistance circle gives rise to

Decrease in the value of reactance
No change in the impedance value
No change in the reactance value
An increase in the value of reactance

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