Two Tiny Particles Having Charges of +5

Multiple Choice

Two tiny particles having charges of +5.00 μC and +7.00 μC are placed along the x-axis.The +5.00-µC particle is at x = 0.00 cm,and the other particle is at x = 100.00 cm.Where on the x-axis must a third charged particle be placed so that the net electrostatic force exerted on it by the other two particles is zero?

A) 4.58 cm
B) 45.8 cm
C) 50 cm
D) 9.12 cm
E) 91.2 cm