Electromagnetic Field Theory
Gradient of scalar field is expressed as

 Outward flux of a vector field per unit volume as the volume about the point tends to zero.
 Gradient of divergence of a vector field minus the curl of the vector field.
 Maximum rate of increase of scalar function at a point.
 Circulation of a vector field per unit area as the area tends to zero.

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Electromagnetic Field Theory
Which of following is true for a purely inductive circuit ?

 Reactive power of the circuit is zero.
 Actual power of the circuit is zero.
 Apparent power of the circuit is zero.
 Any capacitance even if present in the circuit will not be charged.

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