Electromagnetic Field Theory
Two spheres of radius r1 and r2 are connected by a conducting wire. Each of the spheres has been given a charge Q. Now

 larger sphere will have greater potential.
 smaller sphere will have zero potential.
 larger sphere will have smalled potential.
 both of sphere will have same potential.

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Electromagnetic Field Theory
Which of the following statement regarding waveguides is incorrect?

At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides can handle large power at UHF and microwaves
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
At waveguide can be coupled to a coaxial cable

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Electromagnetic Field Theory
Inside a hollow conducting sphere

 electric field is a non zero constant.
 electric field is zero.
 electric field changes with magnitude of the charge given to the conductor.
 electric field changes with distance from the center of the sphere.

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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.
 upper surface of the conductor.
 the ground surface.
 lower surface of the conductor.

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