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.

 2.28 A.
 18.08 A.
 9.04 A.
 4.56 A.

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Electromagnetic Field Theory
Which statement does not say that electrostatic field is conservative?

 If the curl of E is identically zero.
 The potential difference between two points is zero.
 The work done in a closed path inside the fields is zero.
 If is gradient of a scalar potential.

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

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