3-Piece Conductor Set for Electrostatics Lab Equipment_Power Supplies Copper-block plug key switch with

Copper-block plug key switch with two 4mm terminals and a removable plastic-guarded plug

portable enough for mobile demonstrations of current-driven magnetic field strength

letting students directly observe pressure-volume changes under stacked weights

supplying a contrasting reactive-metal electrode pair for Faraday's-laws and ionic-conduction work

3-Piece Conductor Set for Electrostatics Lab Equipment_Power Supplies Copper-block plug key switch withThree brass conductors sphere, cylinder, and cone on interchangeable ebonite insulated pillars, used to map how charge density concentrates at points of higher surface curvature.