Electricity 1

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Across
  1. 4. Device for changing voltage levels
  2. 7. Unit of electrical current
  3. 8. Device storing electrical energy
  4. 10. Material that blocks electrical flow
  5. 15. Material allowing electricity to flow
  6. 16. Electrical socket or outlet
  7. 19. Unit of electrical resistance
  8. 20. Protective tube for electrical wires
Down
  1. 1. Opposition to electrical flow
  2. 2. Electrical pressure
  3. 3. Device to interrupt electrical flow
  4. 5. Electrical device for a specific function
  5. 6. Connecting to the earth for safety
  6. 9. Device for controlling the flow of electricity
  7. 11. Closed loop for electricity
  8. 12. Permanent electrical device like a light
  9. 13. Connection point in a circuit
  10. 14. System of electrical conductors
  11. 17. Safety device against electric shock
  12. 18. Socket for connecting electrical devices