Electromagnetic Field Theory
An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

 9.04 A.
 2.28 A.
 4.56 A.
 18.08 A.

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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

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

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

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

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