A charged aluminum ball is located midway between two uniformly charged plastic

Question

A charged aluminum ball is located midway between two uniformly
charged plastic rings, as shown in the diagram. The ball is
located at the origin, and the rings are centered on the x-axis.
The left ring has a charge of +11 nC, and the right ring has a
charge of –11 nC. The aluminum ball has a charge of –3 nC. The
distance between the rings is 23 cm; the radius of each ring is 9
cm, and the radius of the ball is 4 cm.




A. Draw the distribution of charges in and/or on the aluminum
ball.

B. Draw an arrow representing the electric field at the center
of the aluminum ball, due to the two charged rings. Label the
arrow Erings.

C. Draw an arrow representing the electric field at the center
of the aluminum ball, due only to the charges in and/or on
the aluminum ball. Label this arrow Eball. The relative magnitudes
of the arrows drawn in parts (b) and (c) should be correct.

D. Calculate approximately the electric force on the aluminum
ball, due to the two charged rings. Your answer must be expressed as a vector. Show your work.

E. What approximations or assumptions did you make in your calculation?

Explanation / Answer

not bad work harswe ua -3nc

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