The conductors are enclosed in a lead pipe, 24 in.
The neutralizing conductors for each disk are placed at right angles to each other.
Compared with nonmetallic solids, they in general are good conductors of heat and of electricity.
In some cases the value of this electromotive force between two points or conductors is independent of the precise path selected, and it is then called the potential difference (P.D.) of the two points or conductors.
Clerk Maxwell demonstrated, however, that all electric charge or electrification of conductors consists simply in the establishment of a physical state in the surrounding insulator or dielectric, which state is variously called electric strain, electric displacement or electric polarization.