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Question 5

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[20 points] Uniformly charged distributed

insulating ring and sphere are oriented with a

point charge as seen in figure. If qring = 10 nC,

4sphere -6 nC, q = -3 nC, Rring = 30 cm, Rsphere

= 9 cm, a = 38 cm, and b = 21 cm,

R

a. [5 points] Calculate the potential of the ring at

the center of the ring.

Vring[

b. [5 points] Calculate the potential of the sphere

at the surface of sphere.

V sphere

c. [10 points] Calculate the total potential at point

A due to the ring sphere and point charge.

VA=

V

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