1. For two charges q1 and q2 at a distance r apart, what is the work done to bring these two together? Start by writing down the general expression for work for two like charges. What is the general expression for potential between two charges? Then, explain how we would obtain electric field from potential.

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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.