Consider the proton to be a tiny, thin spherical shell of radius Ro, mass mp and charge e. Assume that the charge and the mass of the proton are uniformly distributed throughout the volume inside the sphere of radius Ro. Calculate the escape velocity of the electron which is located just above the surface of the shell.

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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.