Electromagnetic Field Theory
If in a 1 mF capacitor, an instantaneous displacement current of 1 A is to be established in the spaces between its plates then it is possible by applying

 106 Amp.
 106 volts/sec.
 106 volts.
 106 Amp/sec.

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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.
 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.

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