Electricity - TMA 2 Improvements

3. The unit of resistance.
7. Used to measure the potential difference (voltage) across a component.
8. A component that only allows current to flow in one direction.
9. The blue wire in a plug that completes the circuit.
10. A type of circuit where components are connected in a single loop.
14. The unit of electric current, often shortened to 'amp'.
15. The nationwide system of cables and transformers linking power stations to homes.
18. A type of circuit where there is more than one path for the current.
19. A device used to measure the current in a circuit.
20. A resistor whose resistance decreases as the light intensity increases.

1. The rate of flow of electrical charge.
2. A component whose resistance decreases as its temperature increases.
4. The energy transferred per unit of charge (also known as voltage).
5. The unit of energy.
6. A measure of how much a component slows down the flow of charge.
11. The unit of power, equal to one Joule per second.
12. The brown wire in a three-core cable that carries the alternating potential difference.
13. A device used to change the potential difference of an alternating current.
16. The unit used to measure electrical charge (Q).
17. The green and yellow safety wire that prevents the casing from becoming live.