At which point does the electric field have the greatest magnitude?

Question

The diagram above shows equipotential lines produced by an unknown charge distribution. A, B, C, D, and E are points in the plane.

At which point does the electric field have the greatest magnitude?

(A) A 

(B) B 

(C) C 

(D) D 

(E) E

Answer 1

The correct option is: (B) B 

Explanation: 

E is greatest in magnitude where V changes most rapidly with position (the largest gradient) which is where the lines are closest together.