2039

Physics Electrostatics Level: High School

A positive charge +q is located at the point (x = 0, y = -a) and an equal charge –q is located at point (x = 0, y = +a)

a) Draw a diagram showing positions of the charges.

b) What is the potential at a point on the x axis distance x from origin .

c) Derive an expression for the potential at a point on the y-axis a distance y from the origin.

d)sketch a graph of the potential at points on the y-axis as a function of y in the range of y = -4a to y = +4a . Plot positive potentials upward and negative potential downward .