Bell in Bell Jar
Bell in Bell Jar with Plate and Vacuum Pump Plate
Standard Bells for Bell Jar with Plate and Vacuum Pump Plate are supplied for educational and industrial applications.
The whole apparatus is used to explain that sound needs presence of material medium to propagate.
The Electric Bell operates at 4-6 volts AC/DC, held to a rubber cord in bell jar with coiled wire connections to terminals which are attached to a rubber bung, sealing the jar.