Question

Given the arrangement of charge below and the point P, what do we know for sure?
The distance between adjacent charges is the same for all and the same as the distance from the nearest charges to point P.

• A. The electric potential at point P is positive.
• B. The electric potential at point P is negative.
• C. The electric potential at point P is directed down and to the right.
• D. The electric potential at point P is directed up and to the left.
• E. The electric potential at point P is zero.

Answer 1

Answer: (E)

$PotentialatPisgivenbyV=\frac{-2}{4\pi {\epsilon }_{\circ }2r}+\frac{1}{4\pi {\epsilon }_{\circ }r}+\frac{(-1)}{4\pi {\epsilon }_{\circ }r}+\frac{2}{4\pi {\epsilon }_{\circ }2r}V=0$