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3 point charges are located in a circular arc as shown in the figure. a) Obtain the electric field at point P (center of
the circle). b)Find the electric force exerted on a point charge -5.0 nC located at P.
4.0cm
4.0cm
60.0
93
30.0°
3.0nC
P
3.0nC
-2.0nC
P

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