Is frictional electricity produced only between insulating bodies ?
Frictional electricity is only produced between non-conducting bodies as a result of its method of production. When two dissimilar mating surfaces are dragged in opposite directions frictional resistance produces energy sufficient to dislodge electrons from either surface creating a net-positive effect. This enables a difference in potential energy between the mating surfaces which causes a temporary flow of electrons (frictional electricity) until equilibrium has been re-established. In conducting bodies, this is not really possible since there are free electrons (valence electrons) which when agitated will move freely through the conducting body without being dislodged. This will increase the kinetic energy of the mating surfaces (temperature rise) but without any transfer of electrons between surfaces.
