Three point charges are arranged along the x axis. Charge q1 = -4.10 nC is located at x= 0.240 m and charge q2 = 2.90 nC is at x= -0.340 m . 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 magnitude 3.90 μN ?
B) What is the direction of the net force on q3? C)Where along the x axis can q3 be placed and the net force on it be zero, other than the trivial answers of x=+∞ and x=-∞?