Economy Graphite Crystal Model Set Item Type_Dissection Pins 5-ohm reference coil non-inductively wound

5-ohm reference coil non-inductively wound from constantan on a 43mm ABS-supported bobbin with three 4mm sockets

producing the nearly uniform field used to calibrate magnetic sensors and verify the Helmholtz geometry

and similar simple molecules to teach VSEPR theory and 3D molecular geometry

Built for vacuum filtration

this brass cylinder on an ebonite-insulated base demonstrates Faraday-cage shielding and uniform-curvature charge density

Economy Graphite Crystal Model Set Item Type_Dissection Pins 5-ohm reference coil non-inductively woundEconomy format graphite crystal model showing the layered hexagonal structure and the weak interlayer bonds responsible for graphite's slippery, lubricating properties.