US$ 194.50
iron filings
Single open-or-closed switch on a 4mm-terminal base
this demonstration electroscope detects and visually quantifies the magnitude of static charges
sized for student work spanning single-cell and small-battery-stack voltages
7 inches with five 50mm steel spheres
Resistance Unit, Classroom Grade archive-pending iron filingsFive ohm metal film resistance unit at plus or minus 1% accuracy with a 1. 6V maximum rating, the standard low end Ohm's law value used in current limiting and voltage divider work.
US$ 194.50
US$ 179.00
US$ 147.50
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