At each point on the surface of the cube shown in the figure the electric field is parallel to the z axis. The length of each edge of the cube is 2.5 m. On the top face of the cube the electric field    E→=-48k̂⁢   N/C and on the bottom face it is    E→=+20k̂⁢   N/C. Determine the net charge contained within the cube.

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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.