Chapter 15. Electric Forces and Electric Fields. A Question.
Electric Forces and
Two identical conducting spheres A and B carry equal charge. They are separated by a distance much larger than their diameters. A third identical conducting sphere C is uncharged. Sphere C is first touched to A, then to B, and finally removed. As a result, the electrostatic force between A and B, which was originally F, becomes:
A. F/2 B. F/4 C. 3F/8 D. F/16 E. 0
In Fig. at right, the particles have charges q1 = -q2 = 300 nC and q3 = -q4 = 200 nC, and distance a = 4.0 cm.
What is the direction of the force on particle 4?
[-0.344N, -0.218N], 212.38ºPhy2054: Physics II trial run