Electricity

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Across
  1. 1. The company that manages and supplies electricity to people's homes (8, 4)
  2. 4. These devices can step up or step down a voltage (11)
  3. 6. The unit of electrical current (3)
  4. 7. A diode that can give out light (3)
  5. 10. A property of copper that makes it useful in electrics (9)
  6. 11. The charge on an electron (8)
  7. 12. The unit of potential difference
  8. 14. The unit of electrical frequency (5)
  9. 17. Measures the potential difference in a circuit (9)
  10. 19. The green and yellow wire that is found in a wire (5)
  11. 20. The brown wire in a cable (4)
  12. 21. The unit of electrical resistance (3)
Down
  1. 2. Measures flow of charge in a circuit (7)
  2. 3. A component that can change the flow of charge (8,8)
  3. 5. The blue wire in a plug (7)
  4. 8. A component that allows charge to only flow one way (5)
  5. 9. Safety device in a plug that melts when the current is too high (4)
  6. 13. The unit we use to measure the number of charges (7)
  7. 15. Negative particles that transfer energy in a circuit (9)
  8. 16. The correct name for the flow of electrons (6)
  9. 18. A component that prevents the flow of charge (8)