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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.

 0.88 mm.
  1.77 mm.
 1.32 mm.
 0.

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Electromagnetic Field Theory
What is the value of skin depth as 100 Hz in a material having μr = 1.0 and & σ = 3.60 × 107 s/m

 2.4 mm.
 4 mm.
 8.4 mm.
 10 mm.

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Electromagnetic Field Theory
Materials subjected to rapid reversals of magnetism should have

 high permeability.
 both a and b.
 low permeability.
 low hysteresis loss.

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Electromagnetic Field Theory
The divergence of a vector is a scalar, while the curl of a vector is another

None of these
Scalar
Vector
Unit vector

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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
Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH.

 250.
 150.
 225.
 145.

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