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Three point charges are located on a circular arc as shown in the figure below. (Taker 4.28 cm. Let to the right be the +x direction and up along the screen be the ty direction.)
+5.00 nC
-2.00 nC
r
30.0
30.0
P
+5.00 C
(a) What is the total electric field at P, the center of the arc?
E-
IN/C+
N/C
(b) Find the electric force that would be exerted on a -5.45-nC point charge placed at P
F-
IN
IN

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