Charging of dust in thermal collisional plasmas

Vladimir I Vishnyakov1

  • 1Physical-Chemical Institute for Environmental and Human Protection, UA-Odessa 65082, Ukraine.

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The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.
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The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
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