Electromagnetic Field Theory
Which of the following will increase the antenna radiation efficiency?

Any of the above
Use of larger section of conductor
Providing insulation on conductor
Top loading of antenna

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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

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

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