Electricity Crossword Puzzle

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Across
  1. 4. The use of electricity for therapeutic purposes
  2. 6. Changes alternating current to direct current
  3. 9. Light source that produces redder tones and a warmer cast
  4. 11. Measure of how much electricity is being used
  5. 12. The transfer of heat via direct contact
  6. 13. The negative and positive poles of a circuit
  7. 14. The flow of electrons
  8. 15. Unit of electrical resistance
  9. 16. An economical and long lasting light source
  10. 19. Unit of electrical pressure
  11. 20. Form of energy that produces light, heat and magnetic and chemical changes
  12. 22. Adjusts the flow of current
Down
  1. 1. Source of electricity that produces an alternating current
  2. 2. Changes direct current to alternating current
  3. 3. Material that does not allow current to pass through it
  4. 5. When more current flows than the line is designed to carry
  5. 7. Material that best transports electricity
  6. 8. Source of electricity that only produces direct current
  7. 10. The transfer of heat via a liquid or a gas
  8. 13. The thermal breakdown of the skin
  9. 17. Lighting used most commonly in salons and spas
  10. 18. Reusable safety device
  11. 21. Unit of electric strength