Coulomb motor by rotation of spherical conductors via the electrostatic force

Wistrom, Anders O.; Khachatourian, Armik V. M.
April 2002
Applied Physics Letters;4/15/2002, Vol. 80 Issue 15, p2800
Academic Journal
Three spherical conductors fixed in space and held at constant potential produces a rotational force that causes the conductors to rotate about their axis. The motor is described by an expression for the moment of force given by Coulomb’s law complemented by Gauss’ law of the electric potential. The observed rotation is likely to be general and apply to machines of all size scales where the electrostatic force is the dominant operative force. This would include systems ranging in size from molecular to macroscopic and be useful for devices that require rotational motion. © 2002 American Institute of Physics.


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