The nuclei of two atoms, such as uranium, with 92 protons, can be modeled as spherically symmetric spheres of charge. the radius ofthe uranium nucleus is approximatly 7.4 x 10-15 m. (a) What is the electric field this nucleus produces just outside its                     surface? (b) What magnitude of the electric field does it produce at the distance of        the electrons, which is about 10 x 10-10 m? (c) The electrons can be modeled as forming a negatively charged uniform       shell. What net electric field do they produce at the location of the               nucleus?

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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.