Electricity

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Across
  1. 1. A device, such as a bulb or resistor, that is part of an electrical circuit.
  2. 5. A thin wire that melts if too much current flows, breaking the circuit for safety.
  3. 6. A device that increases voltage before electricity is transmitted across the country.
  4. 7. The flow of electric charge in a circuit.
  5. 11. A safety wire that prevents appliances from becoming live by directing excess current to the ground.
  6. 13. The network that distributes electricity from power stations to homes and businesses.
  7. 14. The process of removing stored electric charge from an object or battery.
  8. 16. A component that limits the flow of electric current in a circuit.
  9. 17. A component that emits light when a current flows through it in the correct direction.
  10. 19. A material, such as copper, that allows electric charge to pass through easily.
  11. 20. The process of adding electric charge to an object or battery.
  12. 26. A device used to measure current in a circuit, always connected in series.
  13. 27. The ability to do work, often transferred by electrical devices.
  14. 28. The unit of resistance.
  15. 30. The unit of power in an electrical circuit.
  16. 31. Two or more cells connected together to provide electrical energy.
  17. 32. A device used to measure potential difference in a circuit, always connected in parallel.
  18. 33. A type of circuit where components are connected across common points, so the current splits into different paths.
  19. 35. A component used to change the resistance in a circuit.
  20. 38. A measure of how difficult it is for current to flow through a component.
  21. 39. A material, such as rubber, that does not allow electric charge to pass through easily.
  22. 41. A unit of power equal to 1000 watts.
  23. 42. The type of current that flows in only one direction, like in batteries.
Down
  1. 2. A place where electrical energy is generated from fuels or renewable sources.
  2. 3. The tiny negatively charged particles that flow in a circuit.
  3. 4. The type of current where the direction of flow changes repeatedly, as in the mains supply.
  4. 7. A property of particles like electrons that causes them to experience electrical forces.
  5. 8. The dangerous effect of electricity passing through the human body.
  6. 9. A rule stating that current is directly proportional to voltage and inversely proportional to resistance.
  7. 10. The rate at which electrical energy is transferred or used in a circuit.
  8. 12. A unit of energy used by electricity companies to measure usage.
  9. 15. The unit of current.
  10. 18. A resistor that changes its resistance depending on the light level.
  11. 20. A single unit that provides electrical energy, often used in batteries.
  12. 21. The wire in a mains circuit that completes the circuit and is usually at 0V.
  13. 22. A type of circuit where components are connected end-to-end, so the same current flows through all of them.
  14. 23. The main electricity supply in homes, typically at 230V in the UK.
  15. 24. A component whose resistance decreases as temperature increases.
  16. 25. A device that decreases voltage before electricity is supplied to homes.
  17. 29. The energy transferred per unit charge between two points in a circuit.
  18. 34. The area around a charged object where other charges experience a force.
  19. 35. The unit of potential difference.
  20. 36. A measure of how much useful energy is output compared to input.
  21. 37. Electricity that builds up on an insulating material due to friction.
  22. 40. The wire in a mains circuit that carries the high voltage and can be dangerous.