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.
 group velocity.
 phase velocity.
 normal velocity.

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Electromagnetic Field Theory
A wire carrying current is bent in the form of a circular loop. Then the magnetic field around each portion of the wire will be

 perpendicular to the circumference of the wire.
 parallel to half portion and perpendicular for the other half.
 parallel to the plane of the wire.
 none of above.

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Electromagnetic Field Theory
If an electric current carrying coil is placed in a uniform magnetic field in the direction of magnetic induction, then

 the net force is zero but torque is finite.
 the net force is finite but torque is zero.
 the net force and torque are both finite.
 the net force and torque on the coil are both zero.

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