Draw a picture showing the charge distribution and the resulting electric field line pattern. If you wish to use separate diagrams to show the charge distribution and the electric field, that is fine. Make sure that you show the electric field lines in all regions of space including all regions where there is no charge and also the regions where the charge resides. To draw the electric field pattern use superposition, that is, the notion that the net electric field at any point in space is the sum of all the electric field contributions from each small part of the charge distribution. The charge distribution can be divided any way that you like as long as you know the field pattern resulting from each part. Use symmetry arguments to aid in this endeavor if at all possible. Your drawings need to be accompanied by some written explanations of the reasoning allowing you to make the drawings. The next few questions involve point charges to guide your discussions: a) Draw 8 electric field lines in the vicinity of a positive charge + Q inside a box b) Do the same for a negative charge - Q inside a box Consider a "Gaussian sphere," outside of which a charge +Q lies. Remember, a Gaussian surface is just a mathematical construct to help us calculate electric fields. Nothing is actually there to interfere with any electric charges or electric fields.

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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.