US$ 19.95
drawing 6V AC for demagnetizing and AC or DC for magnetizing iron bars and strips
Painted red and blue along their lengths to mark north and south poles
portable enough for mobile demonstrations of current-driven magnetic field strength
and string length
paired with 4mm sockets so iron-filing patterns can be mapped around a current-carrying conductor for Oersted's experiment
3-Piece Conductor Set for Electrostatics Lab Equipment_Power Supplies drawing 6V AC for demagnetizingThree brass conductors sphere, cylinder, and cone on interchangeable ebonite insulated pillars, used to map how charge density concentrates at points of higher surface curvature.