In Fig. 24-61a, we move an electron from an infinite distance to a point at distance R

Chapter 24, Problem 60

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In Fig. 24-61a, we move an electron from an infinite distance to a point at distance R 8.00 cm from a tiny charged ball. The move requires work W 2.16 1013 J by us. (a) What is the charge Q on the ball? In Fig. 24-61b, the ball has been sliced up and the slices spread out so that an equal amount of charge is at the hour positions on a circular clock face of radius R 8.00 cm. Now the electron is brought from an infinite distance to the center of d the circle. (b) With that addition of the electron to the system of 12 charged particles, what is the change in the electric potential energy of the system? e eQR(a) (b)Figure 24-61 60.