1. Series Circuit – 1 bulb
Series Circuit – 1 bulb

2. Electric Current is the flow of charge
Current can be measured using an ammeter (connected in series)
Current is measured in Amps (A)
Increasing the Voltage will increase the current
Increasing the Resistance will decrease the current
Electric Current

3. Current in a Series Circuit

4. Current in a Series Circuit

5. Current in a Series Circuit

6. Current in Series & Parallel Circuits
In a series circuit the current is the same everywhere
In a parallel circuit the current divides on entering a junction and rejoins on returning to the battery
Current in Series & Parallel Circuits

7. Current in Series & Parallel Circuits

8. Current in a Parallel Circuit

9. Potential Difference is measured in Volts (V)
Potential Difference is connected to the amount of energy that is gained or lost across part of a circuit
Potential Difference is measured using a Voltmeter (connected in parallel)
Potential Difference is measured in Volts (V)
Potential Difference gained across a cell or battery is called Voltage
Potential Difference

10. PD in Series and Parallel Circuits
PD in Series & Parallel Circuits
In a series circuit the potential difference is shared between the components
In a parallel circuit the potential difference is the same across each component and equals the voltage across the battery
PD in Series and Parallel Circuits

11. Voltage in a Series Circuits

12. Series circuits – 2 bulbs
Series circuit – 2 bulbs
Series circuits – 2 bulbs

13. Parallel Circuit
Parallel Circuit

14. Voltage in a Parallel Circuit

15. Resistance is measured in ohms (Ω)
Resistance = Potential Difference ÷ Current
In a series circuit the total resistance is equal to the sum of the component resistances
Resistance

16. Resistance
Resistance

17. Resistance
Resistance

18. Current-Voltage Graphs
Current-Voltage graphs can be used to show how the current flowing through a component changes with different voltages
The current through a resistor is directly proportional to the voltage across the resistor (at a constant temperature)
Current-Voltage Graphs

19. Current-Voltage Graphs

20. Resistance of Components
The resistance of a filament lamp increases as the filament gets hotter
A diode allows current to flow in one direction only (the diode has a very high resistance in the opposite direction)
The resistance of a light dependent resistor decreases with increasing light intensity
The resistance of a thermistor decreases with increasing temperature
Resistance of Components

21. Resistance of Components

22. Resistance of Components

23. Wordsearch
Wordsearch

24. Quiz
Quiz