US$ 24.90
1100-turn copper coil on a bobbin sized for a double C-core
sized for student work spanning single-cell and small-battery-stack voltages
supplied with keepers in a cardboard storage box for routine classroom work on field lines
iron filings
Resistance Unit, Classroom Grade archive-pending 1100-turn copper coil on aFive 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$ 24.90
US$ 12.95
US$ 52.00
US$ 79.95