Faraday's Butterfly Net Electricity & Magnetism_Circuits the shared mass isolating volume

the shared mass isolating volume and density as the distinguishing variables across metals and polymers

Hand-cranked Van de Graaff generator with a 9

5-inch diameter artery cross sections reveals atherosclerosis

sized so that students can compare its uniform-curvature surface charge against sphere and cone partners in the conductor set

Wider 70 x 20 x 8mm cross-section on this Alnico bar pair gives a broader pole face than typical bar magnets

Faraday's Butterfly Net Electricity & Magnetism_Circuits the shared mass isolating volumeDemonstrates that charge resides only on the outer surface of a conductor by inverting the charged net inside out and showing the charge transferring to the new outside layer.