The figure above shows four very thin parallel planes of charge with equal separation between them. The charge density on plate 1 is 5 0. The charge density on plate 2 is 2 0. The charge density on plate 3 is -4 0. The charge density on plate 4 is -3 0. Your answers for the electric field must include the correct sign. We choose positive electric field along the positive x-direction. What is the Electric Field at point B? (in units of σ/0)

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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.