A point charge having q1 = 4.00 nC is positioned at the origin, and a second point charge q2 = -3.05 nC is positioned on the x-axis at x = + 21.0 cm. A third point charge q3 = 2.10 nC is to be positioned on the x-axis among q1 and q2.
Part I) Determine the potential energy of the system of the three charges when q3 is positioned at x = + 10.0 cm?
Part II) Where must q3 be positioned between q1 and q2 to make the potential energy of the system equivalent to zero?