In the figure the four particles form a square of edge length a = 4.60 cm and have charges q1 = 7.59 nC, q2 = -18.1 r %3D 94 = -7.59 nC. What is the magnitudedf the net electric field produced by the particles at the square's center?

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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.