Electricity Section 3

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Across
  1. 1. Coil of insulated wire that becomes a magnet when current flows through it
  2. 3. Energy does not just appear or disappear, it can only be transformed from one form to another
  3. 4. The ratio of useful energy to total energy
  4. 9. Device that changes electricity from one voltage to a different voltage
  5. 10. Electromagnetic ____: Generation of electric current in a conductor by a changing magnetic field
  6. 13. A device that can convert thermal energy to electrical energy
  7. 16. ____Energy: The energy due to an object’s motion or its potential to move
  8. 17. The unit of power
  9. 19. The unit of energy
  10. 20. The ability to do work
Down
  1. 2. Electricity flows back and forth 60 times per second
  2. 5. Mechanism that makes electrical contact with the moving commutator in a motor
  3. 6. Rotating shaft and coil in a motor or generator
  4. 7. Electricity flows in only one direction
  5. 8. ____Energy: Stored energy of an object because of its relative position
  6. 11. The unit for energy for larger numbers of joules
  7. 12. ____Energy: The total kinetic energy of all the particles in a substance
  8. 14. The rate at which a device converts energy
  9. 15. ____Energy: The energy of charged particles
  10. 18. ____Energy: The energy stored in chemicals