CORE SCIENCE CROSSWORD BY NOON

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Across
  1. 2. Generating a current in a wire by moving the wire in a magnetic field, or by moving a magnet inside a coil of wire.
  2. 5. A length of wire that heats up and melts (‘blows’) if the current is too large, and so cuts off the electrical supply.
  3. 6. A transformer that decreases the voltage of alternating current.
  4. 11. Energy that spreads out into its surroundings so that it is no longer useful.
  5. 14. The energy going into a device.
  6. 15. An electromagnetic device that cuts off the electrical supply, if the current is too large.
  7. 17. The process of changing energy from one form into another.
  8. 18. This safety wire connects the metal case of an appliance to the earth.
  9. 20. A device that increases or decreases the voltage of alternating current.
  10. 21. The unit of power. 1 watt = 1 joule of energy transferred every second.
Down
  1. 1. The domestic electrical power supply with a voltage of 230 V.
  2. 3. A transformer that increases the voltage of alternating current.
  3. 4. A place where the high voltage electricity from the national grid is reduced by transformers so that it can be used in homes.
  4. 7. A measure of how good a device is at changing energy from one form to another.
  5. 8. The forms of energy produced by a device.
  6. 9. The network of high-voltage power lines that carries electricity from power stations across the country.
  7. 10. A current that constantly changes direction. It is produced by most electrical generators.
  8. 11. A current that always flows in the same direction. It is produced by cells and batteries.
  9. 12. The rate at which energy is transferred.
  10. 13. Energy in a form that is not wanted or is not used.
  11. 16. Energy in a form that is wanted.
  12. 19. A machine that converts kinetic energy into electrical energy by induction.