GCSE Physics Double Award notes

1. Electricity 2 Voltage, Potential Difference and Electromotive Force

9. Sorry Sir but I’m gonna’ have to search you… What have you got on you, Mr Coulomb?

10. Experiment- Investigating Voltage How does the voltage of a component in a series circuit compare to the voltage of a component in a parallel circuit? The following two circuits are set up and the voltage is measured across both 1.5 V batteries and across each 1.5V bulb individually.

11. Experiment- Investigating Voltage V 1 = V 2 = V 3 = V 4 = V 5 = V 6 = Series Parallel + V 1 Series + Parallel

13. Voltage in a series circuit V V V 2V If the voltage across the battery is 6V… … and these bulbs are all identical… … what will the voltage across each bulb be?

14. Voltage in a series circuit 4V V V If the voltage across the battery is 6V… … what will the voltage across two bulbs be?

15. Voltage in a parallel circuit 4V 4V If the voltage across the batteries is 4V… What is the voltage here? And here? V V

16. Summary In a PARALLEL circuit : Current SPLITS UP down each “strand” Voltage is THE SAME across each”strand” In a SERIES circuit: Current is THE SAME at any point Voltage SPLITS UP over each component

17. An example question: V 1 V 2 6 V 3 A A 1 A 2 V 3 A 3 What is the easiest path for the Coulombs of Charge? All bulbs are identical in power rating