Electromagnetic Field Theory
A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of electric field intensity, E, at a distance r (o less than r less than R) inside the sphere

 3 Qr/(4 π εo R3).
 QR/(4π εo r3).
 Q/(4 π εo r3).
 Qr/(4 π εo R3).

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

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