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three point charges lie along a circle of radius r= 3.00 cm: q1=7.00 nC at angle...

three point charges lie along a circle of radius r= 3.00 cm: q1=7.00 nC at angle 30, q2 = +9.00 nC angle 180 , and q3 = +7.00 nC at angle 330 shown in the figure . find the magnitude E of the electric field created by the three charges at the center O of the circle :

A. E= 8.00 =10 NUC

B.E= 1.14 = 10 NUC

C. E=2.00= 10 NUC

D.E= 1.60 = 10 NUC

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