Topic 10 + 12

123456789101112131415161718192021222324
Across
  1. 4. brushes – Conductive parts that maintain contact in a motor with the split ring commutator (13)
  2. 5. – Unit of electric charge (7)
  3. 7. – Colour of the live wire in a UK plug (5)
  4. 8. – Unit of energy (6)
  5. 11. – Type of electric charge carried by protons (8)
  6. 14. – Component that allows current in one direction only (5)
  7. 15. – Flow of electric charge in a circuit (7)
  8. 18. wire – Wire that completes the circuit back to the supply (11)
  9. 21. – When two objects meet and exert forces on each other (9)
  10. 22. – Electrical potential difference between two points (7)
  11. 23. – Direction of magnetic field lines from a magnet (5)
  12. 24. wire – Safety wire that prevents electric shock (9)
Down
  1. 1. field – Region where magnetic forces act (13)
  2. 2. – Safety device that melts if current is too high (4)
  3. 3. – Scientist linked to the left-hand rule for motors (7)
  4. 6. – Slope of a graph, often used for rate calculations (8)
  5. 9. – Type of circuit where components are in one loop (6)
  6. 10. ring commutator – Device that reverses current every half turn in a motor (21)
  7. 12. – SI unit of time (6)
  8. 13. – Circuit where components have separate branches (8)
  9. 16. – A resistor whose resistance changes with temperature (9)
  10. 17. – Opposition to the flow of current (10)
  11. 19. – Rate of energy transfer or work done (5)
  12. 20. effect – Force on a current-carrying wire in a magnetic field (11)