Three point charges are arranged along the x-axis. Charge q1= -4.85 nC is located at x1= 0.205m , and charge q2= 2.75 nC is at x2= -0.310m A positive point charge q3 is located at the origin.
A. What must the value of q3 be for the net force on this point charge to have a magnitude of 3.85×10-6 ?
B. What is the direction of the net force on q3?
C. Where along the x-axis can be placed and the net force on it be zero, other than the trivial answers of x=±∞?