Spherical Conductor, 8cm Diameter Subcategory_Sound and Resonance showing how current through an

showing how current through an iron core builds magnetic flux in student investigations

Hand-cranked to convert mechanical work into electrostatic energy

set in motion by ion wind from corona discharge whenever the apparatus is connected to a high-voltage source

Rectangular casted metal case and polythene insulated lid with finger flap to facilitate removal & front glass window

Five ceramic ring magnets at 1

Spherical Conductor, 8cm Diameter Subcategory_Sound and Resonance showing how current through anPolished 8cm brass sphere on an ebonite insulated metal base, sized to retain induced charge through demonstrations of Coulomb's law and surface charge distribution.