Two charged objects are separated by a distance R and have exactly the same charge q on each.  The first charge exerts a force F on the second charge.  What is the magnitude of the force the first charge exerts on the second charge if they are separated by a distance 2R?  A.  F  B.  F/4  C.  2F  D.  F/2  E.  Not enough information is given.  F.  4F

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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.