The PH0918A Hand-Driven Van de Graaff Generator provides an exciting demonstration of electrostatics.
Hand operated on base. The generator is self exiting and charge separation occurs. A metal sphere of diameter 20 cm. surrounds the upper pulley assembly and charge accumulates on the sphere, which is insulated by a plastic column supporting the pulley assembly. The charge builds up until electrical breakdown of air surrounding the sphere occurs. Supplied with a discharging sphere 10 cm diameter.