The hall of electricity at Boston museum of science contains a large van-degraff gunerator a device that builds up charge on a metal sphere. A Metal sphere has radius, r=2.30m devalops a charge of 640 micro coloumb consider this to be single isolaled sphere. Find Potential of its surface. The work neded to bring a proton from infinity to sphere surface, the potential difference between the sphere surface and a point 2 r from is centre.

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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.