NPN Transistor Unit Item Type_Mug Iron anode-and-cathode pair fitted into

Iron anode-and-cathode pair fitted into a rubber bung for the student electrolyzer

a sliding front door

designed to slot onto the demountable U-core and combine with other coil ratios for electromagnetic induction demonstrations

letting students route current down either branch of a circuit by choosing which slot the plug occupies

this two-coil demonstration transformer lets students swap primary and secondary windings to watch step-up and step-down voltage shifts firsthand

NPN Transistor Unit Item Type_Mug Iron anode-and-cathode pair fitted intoNPN transistor in a protective enclosure with labeled base, collector, and emitter terminals, supplying a robust hands on component for amplifier, switching, and logic circuit demonstrations.