Crossword 1

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Across
  1. 3. Mechanical part that reduces friction between moving parts
  2. 4. Electric potential difference
  3. 6. Component that allows current in only one direction
  4. 9. Semiconductor device used for switching and amplification
  5. 10. Rotating machine element for power transmission
  6. 12. Unit of power
  7. 13. Closed path for current to flow
  8. 14. Device used to measure resistance
  9. 15. Component that resists change in current
Down
  1. 1. Simple machine used to lift loads with rope or belt
  2. 2. Device that increases signal strength
  3. 5. Simple machine that pivots on a fulcrum
  4. 7. Component that limits current flow
  5. 8. Device that stores electric charge
  6. 11. Rotational force