Faraday's Butterfly Net Electricity & Magnetism_Circuits Reel of bare 18 SWG

Reel of bare 18 SWG copper wire totaling roughly 80 feet by mass

5mm copper wire on a clear acrylic base support side-by-side comparison of how loop count multiplies the on-axis magnetic field at fixed current

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

5-inch diameter artery cross sections reveals atherosclerosis

Faraday's Butterfly Net Electricity & Magnetism_Circuits Reel of bare 18 SWGDemonstrates 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.