1. Three point charges lie in a straight line along the y-axis. A charge of q1 = -9.60 µC is at y = 6.90 m, and a charge of q2 = -8.50 µC is at y = -4.10 m. The net electric force on the third point charge is zero. Where is this charge located.
2. A charge of 2.0 nC and a charge of 5.4 nC are separated by 37.10 cm. Find the equilibrium position for a -4.5 nC charge.
3. What are the magnitude and direction of the electric field 12.5 cm directly above an isolated 38.5 x 10-6 C charge?