Three point charges are arranged along the x- axis. Charge q1 = - 4.30 nC is located at x= 0.210 m and charge q2 = 2.50 nC is at x = -0.310 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 4.80 μ.? b) What is the direction of the net force on q3? c) Where, other than at infinity, along the x-axis can q3 be placed to make the net force on it be zero.

Three point charges are arranged along the x- axis. Charge q1 = - 4.30 nC is located at x= 0.210 m and charge q2 = 2.50 nC is at x = -0.310 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 4.80 μ.? b) What is the direction of the net force on q3? c) Where, other than at infinity, along the x-axis can q3 be placed to make the net force on it be zero.