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Across 2. This is measured in volts (V) 6. The build-up of electrical charges on an object 8. Magnet made by wrapping a wire coil around an iron core 9. Increases or decreases the voltage of an alternating current 10. A device used to detect the presence of electric charges 11. A material that allows electrons to move easily through it 12. Measures potential differences 15. Induces electrical curent by rotating loops of wire through a magnetic field 16. Groups of atoms with aligned magnetic poles 20. The opposition to the flow of electrons through a conductor 22. This is expressed in watts (W) or kilowatts (kW) 24. An area surrounding an electron that exerts a force on anything nearby with an electric charge 25. A power source that acts as an electron pump; "dry" because it uses a thick, pasty electrolyte 26. Has no electrical resistance; current does not loose energy 27. It equals 1000 watts 28. A material that does not allow heat or electrons to move through it easily 29. An electrical circuit where the current has only one path.

Down 1. Force of attraction between unlike poles or repulsion between like poles 3. Creating an electrical current by passing a wire through a magnetic field 4. AC 5. Changes elecrical energy to magnetical energy 7. A closed circuit through which electrons flow 13. The two ends of a magnet 14. A galvanometer that measures electrical current passing through in amperes 16. The region around a magnet where magnetic forces act 17. DC 18. An electrical circuit where the current flows through more than one path 19. A power source that acts as an electron pump; "wet" because it uses a liquid electrolyte 21. V = I x R 23. The flow of electrons through a wire or any conductor