Van De Graaff Generator Hand-Driven 1224 24 x Playground balls (135

24 x Playground balls (135 and 165mm)

and the reliability of the mechanism ensures that ticker-tape experiments are no longer hit and miss

ideal for primary PE lessons and active play

Accuracy ±2%

Van De Graaff Generator Hand-Driven 1224 24 x Playground balls (135The discharge sphere is supported on a pivoted arm with a handle and is attached to the top of the driving wheel pillar. For connecting accessories, a 4mm socket is provided at the top of the large sphere, and a 4mm earth socket is drilled in the handwheel pillar base. Sparks in excess of 50mm in length are easily obtained at a slow rate of turning (200 rev min) and the apparatus is tolerant of moisture and dust. Diameter of dome: 200mm. Diameter of