A point charge q1 = 4nC is placed at the origin, a second point charge q2 = -3nC is placed on the x-axis at x = 20cm and a third charge q3 = 2nC is placed at x = 10cm. What is the potential energy of the system of three charges?     180 nJ     -180 nJ     360 nJ     -360 nJ

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A point charge q1 = 4nC is placed at the origin, a second point charge q2 = -3nC is placed on the x-axis at x = 20cm and a third charge q3 = 2nC is placed at x = 10cm. What is the potential energy of the system of three charges?

   

180 nJ

   

-180 nJ

   

360 nJ

   

-360 nJ

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