Van de Graaff Generator is considered an important and powerful apparatus to perform electricity experiments. Its great appeal  to attracts students into the amazing world of physics. Useful  for studying various phenomena associated with electric charge. Hand operated Van  De  Graaff  Generator, mounted on base , Comprises a 20 cm diameter metal sphere supported on top of an insulated, clear Perspex pillar on the base. A removable flat rubber belt rotates through rollers mounted at both the ends of perspex  pillar. Lower roller shaft has a pulley driven by a hand operated crank through rubber belt. The continuous rotation of the flat rubber belt results in the accumulation of charge on the dome, until electrical breakdown of air surrounding the sphere occurs. With sufficient charge build up on the dome, bringing the earthed discharge sphere sufficiently close to it results in the transfer of charge from dome to ground in the form of electric spark. Earthing terminal provided on the base. Supplied with discharge sphere, mounted on a long insulated handle.