Summary
The electrostatic force between a charged conducting sphere and a charged dielectric sphere in a uniform, arbitrarily oriented external electric field is obtained and presented in terms of force coefficients which depend only on the relative geometry of the two spheres and the dielectric constants of the dielectric sphere and the medium. When the dielectric constant of the dielectric sphere is allowed to approach infinity, the resulting computed force agrees with that ofDavis (1964) for two conducting spheres, and when the external field and the charge on the dielectric sphere are set to zero, the resulting force agrees with that ofHall andBeard (1975) for a charged conducting sphere near an uncharged dielectric sphere.
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References
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M. H. Davis (1969),Electrostatic field and force on a dielectric sphere near a conducting plane—a note on the application of electrostatic theory to water droplets, Amer. J. Phys.37, 26–29.
W. D. Hall andK. V. Beard (1975),Electrostatic force between a conducting sphere and a dielectric sphere, Pure Appl. Geoph.113, 515–524.
P. M. Morse andH. Feshbach,Methods of Mathematical Physics (McGraw-Hill, New York 1953), Vol. 2, Sect. 10.3.
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Grover, S.N. The electrostatic force between a charged conducting sphere and a charged dielectric sphere in an arbitrarily oriented external electric field. PAGEOPH 114, 521–539 (1976). https://doi.org/10.1007/BF00875648
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DOI: https://doi.org/10.1007/BF00875648