The drawing shows four point charges.

Question

The drawing shows four point charges. The value of q is 3.9 μC, and the distance d is 0.94 m. Find the total potential at the location P. Assume that the potential of a point charge is zero at infinity.

Answer 1

The formula for potential energy is:

 

V = k(q/r) , where

 

V = potential energy of a charge

k = constant = 9x10⁹ (Nm²)/C²

q = charge in coulombs

r = the distance between the charge and the point

 

Draw your 4 points in a superposition model.   Also, is each charge equidistant from each other?