Electromagnetic Field Theory
A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be

 none of above.
 perpendicular to the circumference of the wire.
 parallel to the plane of the wire.
 parallel to half portion and perpendicular for the other half.

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

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Electromagnetic Field Theory
The developed electromagnetic force and or torque in electromechanical energy conversion system act in a direction that tends

 to increase the stored energy at constant flux.
 to decrease the stored energy at constant mmf.
 to decrease the co-energy at constant mmf.
 to decrease the stored energy at constant flux.

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