• Demo Oersted’s discovery using a compass
• Attempt to make it quantitative rather than just an indicator
  • Expect failure on that
• Reproduce Ohm’s torsion galvanometer, with calibration
• Build a d’Arsenval meter and calibrate it
• Reproduce Ohm’s experiments with different lengths of identical wire
  • Use AAA batteries in various combinations for Voltage
  • Use a consistent set of wire lengths
  • So resistance is proportional to wire length
  • voltage is roughly 1.5V per AAA cell
  • Current is measured by meter
  • Make a graph
  • Calculate
  • Create my own units.
    • Voltage = # AAA cells
    • Resistance = length of wire
    • Current = degrees offset by meter
  • Prove Ohm’s law with the new units

Piece of cake.