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Electromagnetic Field Theory

Electromagnetic Field Theory
For an inductor, current is proportional to

 both (A) and (B).
 none of them.
 magnetic field.
 voltage across the inductor.

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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
Find the strength of the magnetic field when a 2m long conductor is moving with a velocity 4m/s inducing an emf of 20V.

 10T.
 0.5T.
 2.5T.
 5T.

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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

 40 nj.
 20 nj.
 60 nj.
 100 nj.

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

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

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Electromagnetic Field Theory
When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called

Scattering
Dispersion
Absorption
Polarisation

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