Four charges are arranged at the corners of a square as shown in the figure. Q 1

Question

Four charges are arranged at the corners of a square as shown in the figure. Q1is at (-L/2,L/2), Q2is at (L/2,L/2), point a is at the origin and Q1=Q2=-Q3=-Q4. Which of the following statements correctly describe the electric field E and the potential at points a,b and c? Select true or false for each statement.

The potential at b is greater(more positive) than the potential at a.

The potential at a is zero.

The potential at b is zero.

The E field at a is zero.

The E field at c is zero.

The potential at c is zero.

a, b, and c all lie on the same equipotential surface.

Explanation / Answer

The E field at c is zero.

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