electrical engineering

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Across
  1. 2. Semiconductor used for amplification or switching
  2. 4. Electrically operated switch
  3. 7. Machine that converts mechanical energy into electrical energy
  4. 10. Flow of electric charge in a conductor
  5. 11. Material that resists the flow of electricity
  6. 15. Reference point in an electrical system
  7. 16. Opposition to the flow of current
  8. 18. Device that stores electrical energy in an electric field
  9. 19. Unit used to measure electric current
Down
  1. 1. Material that allows electricity to pass easily
  2. 2. Device used to step up or step down voltage
  3. 3. Semiconductor device allowing current in one direction
  4. 5. Closed path through which electric current flows
  5. 6. Electrical potential difference between two points
  6. 8. Number of cycles per second (Hz)
  7. 9. Unit of electrical power
  8. 11. Coil that stores energy in a magnetic field
  9. 12. Hint (Clue)
  10. 13. Safety device that melts when current exceeds limit
  11. 14. Source of electrical energy using chemical reactions
  12. 17. Unit of electrical resistance