Homework Statement
There are three charges q1, q2 and q3 situated at corners of a rectangle of sides a = 15.0 cm and b = 8.0 cm.
For q1 = 4.90 μC, q2 = -4.90 μC, and q3 = 1.50 μC
a) find the electric potential at the center of the rectangle.
b) Continuing with the system above...