Solution: Two charges, q1 = 5 μC  and q 2 = 7 μC, are separated by 10 cm, with q 1 to the left of q2. Where is the net electric field, due to both charges, zero? 

Problem

Two charges, q1 = 5 μC  and q 2 = 7 μC, are separated by 10 cm, with q 1 to the left of q2. Where is the net electric field, due to both charges, zero?