In the figure the four particles form a square of edge length a = 6.30 cm and have charges q1 = 9.92 nC, 92=-22.0 nC, 93 = 22.0 nC, and 94-9.92 nC. What is the magnitude of the net electric field produced by the particles at the square's center? Number i 77.457 Units N 191 94 4

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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.