It is used for investigating some of the factors influencing the capacitance of a condenser; such as the distance between the plates and the nature of the medium between them.
It consists of two adjustable plates, 100mm in diameter, supported on insulating pillars and provided with insulating handles on the ends of the adjustment slide rods.
4mm sockets are drilled in the end of the adjustment rods for connection to an electroscope and Earth.
A rectangular glass plate is supplied which mounts in clips between the two discs and maybe easily replaced by a plate of some other material to show the effect of different dielectrics.
The whole set up is mounted on a plastic base.
Other dielectrics included in this kit are flat square plates of wood and Perspex.