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Across 2. What current is measured in. 5. A device for disconnecting a circuit. 9. Lots of sockets connected together. (4,4) (2 words) 12. One of the towers that carries electricity around the country. 13. Device for stepping voltages up or down. 16. What the coloured plastic coating on wire is called. 17. The way the current in a domestic supply constantly changes. 18. A resistor that reacts to heat. 20. The bit that remains stationary in a motor. 22. Measures waveforms. 23. The study and use of semi-conductors. 26. Make connection by pushing it in. 28. The action of removing the insulation from wire. 31. A device that gives DC electrical energy from chemicals. 33. An attractive force that makes motors and other stuff work. 34. Melt it to fix components to the board. 35. Light emitter - one way too! 36. Unit of resistance. 39. Tool that grips and cuts sometimes. 44. The wire melts to protect you. 45. Something that replenishes a battery's energy. 46. An abreviation for a light sensitive device.

Down 1. Electromotive force and potential difference is measured in this. 3. What gives us turning power from electricity. 4. A unit that gives off light from an element. 6. Something that is good at passing a current. 7. A device that produces electricity. 8. The points where we attach wires or components tegether. 10. What we use to measure electrical energy. 11. A component that limits the flow of current. 13. Semi-conductor with 3 connections to it. 14. A type of lighting tube. 15. The box with all the fuses or circuit breakers in. (8,4) (2 words) 19. The unit of inductance. 21. Something that is bad at passing a current. 24. A device that stores electrical charge. 25. What most cables are made from. 27. A tool that squashes a connection onto a wire. 29. The unit of capacitance. 30. Full wave or half wave device to change AC to DC. 32. A portable supply of light. 34. Something you get when touching high voltage. 37. Abreviation for a protective device. 38. Current only flows one way through this component 40. The bit that turns in a motor. 41. Popular brand of insulation tester. 42. Take the plug! 43. Another name for wire.