Electromagnetic Field Theory
As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the

 velocity of propagation.
 normal velocity.
 phase velocity.
 group velocity.

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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

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

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