Electromagnetic Field Theory
The drawback of Daltons atomic structure is that, it says

 unique nature of atom.
 none of these.
 most of the volume of an atom is empty space.
 the atoms can neither be created nor be destroyed.

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Electromagnetic Field Theory
According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

 directly proportional to the distance between them.
 directly proportional to the square of the distance between them.
 inversely proportional to the square of the distance between them.
 inversely proportional to the distance between them.

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

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

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