A Q1 = - 3.0 nC point charge and a Q1 = - 9.0 nC point charge are 5 cm apart on the x-axis.
Find the point on the x -axis where the electric field is zero.
Hint: Draw Electric vectors for both charges at a point between the two charge, and also at a point outside of the two charges on the right side of Q2 and on the left side of Q1