13. Two point charges are fixed on the y axis: a negative point charge q1 = -25 µC at y1 = +0.22 m and a positive point charge q2 at y2 = +0.34 m. A third point charge q = +8.4 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the other two charges has a magnitude of 27 N and points in the +y direction. Determine the magnitude of q2.

Since the force from charge 1 is greater than the total force, the charge q₂ must be positive and create a repulsive or down force on q.

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This page last updated on May 31, 2018