Electromagnetic Field Theory
The Kirchhoff’s current law is implict in expression

  Surface integral of (j.ds) = 0.
 Divergence of B = 0.
 Curl of H = J + (δ D)/(δ t).
 Divergence of D = ρv.

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Electromagnetic Field Theory
A copper disc is rotated rapidly below a freely suspended magnetic needle. The magnetic needle starts rotating with velocity

 equal to that of disc and in the opposite direction.
 less than that of disc and in the same direction.
 less than that of disc but in opposite direction.
 equal to that of disc and in the same direction.

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Electromagnetic Field Theory
A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at

 lower surface of the conductor.
 midway between the conductor and ground.
 the ground surface.
 upper surface of the conductor.

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Electromagnetic Field Theory
Which of the following statement is correct for divergence of electric and magnetic flux densities?

 Both are zero.
 It is zero for the electric flux density.
 These are zero for static densities but non zero for time varying densities.
 It is zero for the magnetic flux density.

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