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

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

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

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

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