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

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

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Electromagnetic Field Theory
According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

 directly proportional to the distance between them.
 inversely proportional to the square of the distance between them.
 inversely proportional to the distance between them.
 directly proportional to the square of the distance between them.

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