Electric bell Workable on 4-6 Volts AC/DC . Terminals for connections are fitted on Rubber bung placed for sealing the jar
PHY-00078/1 Bell in Vacuum Acrylic
PHY-00078/2 Bell in Vacuum Glass
Sphere of 50 mm dia mounted on an insulated stand and insulated handles, demonstrating the charge resides only outside surface of a conductor. Fixed on base.