Experiment with conductivity in metals, plastics and photoconductors. See why metals conduct and plastics don't, and why some materials conduct only when you shine a flashlight on them.

Sample Learning Goals

  • Identify the driving force in a circuit.
  • Explain the difference in conducting behavior between metals, plastics, and photoconductors in terms of the difference in the structure of energy levels.
  • Explain why shining light on a photoconductor causes it to conduct.