Electromagnetic Field Theory
Magnetic current is composed of which of the following?

None of these
 Only conduction current.
 Both conduction and displacement current.
 Only displacement current.

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

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