College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 47

A positive point charge q = + 2.50 nC is located at x = 1.20 m and a negative charge of 2 q = 5.00 nC is located at the origin as in Figure P16.18. (a) Sketch the electric potential versus x for points along the x -axis in the range 1.50 m x 1.50 m. (b) Find a symbolic expression for the potential on the x -axis at an arbitrary point P between the two charges. (c) Find the electric potential at x = 0.600 m. (d) Find the point along the x -axis between the two charges where the electric potential is zero.