Consider a cube with edge length L immersed in a uniform electric field E along the x-direction as shown in the figure below. Calculate the electric flux through the closed surface.   We need to solve for the electric flux through each face of the cube and take the sum to calculate the net electric flux:   The flux through surface 1 is: . The flux through surface 2 is:   . The flux through surface 3 is:   . The flux through the surface on the xy plane is:   . The flux through the surface on the xz plane is:   . The flux through the surface on the yz plane is:   .  Taking the algebraic sum, the net electric flux through the cube is:   .

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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.