Resistor Demonstration Board Geology 600 turns) and a load

600 turns) and a load hook beneath the core let students isolate the effect of turns from current on electromagnet pull force

Two borosilicate-glass flask electroscopes with discs

sized for cross-bench patch runs in small-scale electronics work where larger 4mm hardware is impractical

Wear-replacement timer switch for the goggle sanitizer cabinet

Safety-plug 150mm black 4mm-stackable lead rated to 12A with shrouded contact pins

Resistor Demonstration Board Geology 600 turns) and a loadDesigned to teach Ohm's law and current limiting behavior, this resistor module on a demonstration base with 4mm plug connections drops into series with bulbs and LEDs in student circuits.