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

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

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Electromagnetic Field Theory
Gradient of scalar field is expressed as

 Circulation of a vector field per unit area as the area 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.
 Outward flux of a vector field per unit volume as the volume about the point tends to zero.

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