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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Q: point

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.