What is the net electric flux through the closed surface in each case shown below? Assume that 5 lines leave a charge of +q or terminate on a charge of -q. (Assume that all the surfaces are three dimensional.) Use the net number of field lines leaving the surface as a measure of flux. Explain in the spaces below how you arrived at your answers. a. +q b. d. +29 +9 +29 -3q -q +29 -39

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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.