5F10.15: Water Analog


Description: This is a visual model of a voltage drop and the current.


  • Bucket
  • 2 Ring stands
  • circular ring clamp
  • 2L bottle with hose
  • food dye

Setup Procedure:

  1. Fill the bottle to the brim with water
  2. Add food coloring and attach to stand with circular ring
  3. clip the opposite end of the hose to another ring stand so that it rests above the inverted bottle

Demonstration Procedure:

  1. Raise the height of the bottle on the stand until water begins to flow into the bucket
  2. Raising the bottle corresponds to an increase in potential difference to represent voltage
  3. The flowing water represents electric current flowing from a high to a low potential
  4. Return bottle to original height when done

Note: If not done over the sink, include a bucket.