1. Electronics Revision Part 2

2. A diode A filament lamp A resistor at constant temperature

3. A diode A filament lamp A resistor at constant temperature

4. A diode A filament lamp A resistor at constant temperature

6. The resistance of a light-dependent resistor (LDR) ________ as light intensity increases.
decreases

7. The resistance of a thermistor _________ as the temperature increases
decreases

8. The greater the resistance the smaller the _______
Current

9. For components connected in _____ the total resistance is the sum of the resistance of each component
series

10. parallel
For components connected in _____ the total current through the whole circuit is the sum of the currents through the separate components.

11. For components connected in _____ there is the same current through each component
series

12. parallel
For components connected in _____ the potential difference across each component is the same.

13. For components connected in _____ the total potential difference of the supply is shared between the components.
series

14. Cells and batteries supply current which always passes in the same direction. This is called ______ ______.
Direct Current

15. An ________ current is one which is constantly changing direction.
Alternating
An ________ current is one which is constantly changing direction.

16. In the UK it has a frequency of __ cycles per second (__ hertz).50 50

17. When the current in a fuse wire exceeds the rating of the fuse it will ____, breaking the circuit.
melt

18. The ____ wire and fuse together protect the appliance and the user.
earth
The ____ wire and fuse together protect the appliance and the user.

19. When an electrical charge flows through a resistor, electrical energy is transformed into ___ energy.
heat

20. 4 How does the earth wire and fuse together protect you from danger or electrocution?
Where does the earth wire connect in a metal cased device? (Diagram)
2 What are the three ratings of fuse?
1 The 3 pin plug – diagram with parts labelled correctly