Electromagnetic Field Theory
A copper disc is rotated rapidly below a freely suspended magnetic needle. The magnetic needle starts rotating with velocity

 equal to that of disc and in the same direction.
 less than that of disc and in the same direction.
 equal to that of disc and in the opposite direction.
 less than that of disc but in opposite direction.

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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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