Year 9 Electricity

Edit Answers
1234567891011121314151617181920212223
Across
  1. 2. A type of current that constantly changes direction (Starts with A, 11 letters)
  2. 4. A type of current that flows in one direction only such as from a battery (Starts with D, 6 letters)
  3. 6. A conductor where current is directly proportional to potential difference at a constant temperature (Starts with O, 5 letters)
  4. 9. The system of cables and transformers linking power stations to consumers across the UK (Starts with N, 12 letters)
  5. 11. The brown wire in a three core mains cable that carries the alternating potential difference (Starts with L, 4 letters)
  6. 13. A type of transformer that increases potential difference and decreases current to reduce energy loss in cables (Starts with S, 6 letters)
  7. 16. The unit of electric current (Starts with A, 6 letters)
  8. 17. The green and yellow safety wire in a three core mains cable that stops the appliance casing from becoming live (Starts with E, 5 letters)
  9. 18. A safety device containing a thin wire that melts if the current gets too high (Starts with F, 4 letters)
  10. 20. A type of circuit where components are connected end to end in a single loop (Starts with S, 6 letters)
  11. 22. The blue wire in a three core mains cable that completes the circuit (Starts with N, 7 letters)
  12. 23. The unit of electric charge (Starts with C, 7 letters)
Down
  1. 1. The work done per unit charge moving between two points in a circuit also known as voltage (Starts with P, 19 letters)
  2. 3. A light dependent resistor whose resistance decreases as light intensity increases (Starts with L, 3 letters)
  3. 4. A component that allows current to flow in one direction only (Starts with D, 5 letters)
  4. 5. A fundamental property of matter that can be positive or negative measured in coulombs (Starts with C, 6 letters)
  5. 7. The electricity supply to houses which in the UK is alternating current at 230 volts (Starts with M, 5 letters)
  6. 8. The rate of flow of electrical charge (Starts with C, 7 letters)
  7. 10. The unit of electrical resistance (Starts with O, 3 letters)
  8. 12. A temperature dependent resistor whose resistance decreases as temperature increases (Starts with T, 10 letters)
  9. 14. A type of circuit where components are connected in separate branches (Starts with P, 8 letters)
  10. 15. A measure of how much a component opposes the flow of electrical current (Starts with R, 10 letters)
  11. 19. The unit of potential difference (Starts with V, 4 letters)
  12. 21. A type of transformer that decreases potential difference to a safer level for homes (Starts with S, 8 letters)