Electromagnetic Field Theory
A sphere of radius with a uniform charge density ρv C/m3 shall have electric flux density at radius “r = a” equal to

 aρv/3 C/m2.
 aρv C/m2.
 aρv/4 C/m2.
 ρv/3 C/m2.

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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

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

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Electromagnetic Field Theory
A rectangular waveguide is a

Hollow rectangular walled room carrying electromagnetic wave
Tube antenna to transmit and receive electromagnetic waves
Hollow rectangular conducting tube through which electromagnetic waves can be propagat-ed
Rectangular conducting wire to propagate electromagnetic waves

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