Electromagnetic Field Theory
Electric field intensity (E) at ant point in an electric field is equal to

 (potential gradient)1/2.
 (potential gradient)1/3.
 potential gradient.
 (potential gradient)2.

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Electromagnetic Field Theory
According to maximum power transfer theorem, the maximum power is absorbed by one network from another network when

None of these
The impedance of one of the networks is half that of the other
The impedance of one is equal to that of the other
The impedance of one is the complex conjugate of the other

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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

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

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