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 exits between the conductor and the ground. The maximum electric stress occur at

 Midway between the conductor and ground.
 The upper surface of the conductor.
 The lower surface of the conductor.
 The ground surface.

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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

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

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Electromagnetic Field Theory
The effective reactance of an inductive coil

 none of these.
 decreases because of stray capacitance as the frequency increases.
 increases because of stray capacitance as the frequency increases.
 remains same irrespective of the frequency.

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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.
 If is gradient of a scalar potential.
 The work done in a closed path inside the fields is zero.

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