• The field lines near charged electrodes can be observed in a tank underneath that has particles suspended in a fluid.
  • Patterns include:
    • 2 points - opposite polarity
    • 2 points - same polarity
    • 2 parallel plates - opposite polarity
    • 2 concentric rings - opposite polarity
    • point charge in ring - opposite polarity
  • Can be used on an OHP or document camera with base light.
  • Tank can be damaged by heat if left on the OHP too long.

        (show assembly, charging technique and removing charge on tank.)
        (store templates with electrodes up)

  • Pattern produced by 2 points with the same polarity.

  • Pattern produced by 2 parallel plates of opposite polarity.