van de graaff generator offered by us, comes in a low voltage powered model designed for operation on a 3 to 5 vb d.c. Supply, which is capable for providing in a current of 1.5 a. Power input is via a pair of color coded 4mm sockets and mains operated versions are provided with 1.5m of three core mains cable. In addition, both voltage and mains versions also have independent 4mm earth sockets with discharger 75mm diameter with handle.