1. Brainiac http://www.youtube.com/watch?v=-n1pSHzdahc

2. 5.2 Current and Voltage 16 January 2011 What are the key words to do with ‘electricity’? Can you define them?

13. Aims State the equations of current and voltage in a series circuit Describe the changes in current and voltage in a series circuit Define current and voltage

14. Current

16. What if we apply the brakes?

17. For a series circuit: The current is the same throughout the circuit

18. Current is the rate of flow of charge

19. Current A ☺ ☺ ☺ ☺ ☺ I’m counting how many coulombs of electrons go past me every second ☺ ☺ The number of Coulombs flowing past a point in the circuit every second. I = Q/t ☺ ☺ ☺ ☺ 1 Amp = 1 coulomb per second

20. Voltage

22. For a series circuit: The total voltage is the sum of the individual voltages

23. Voltage(emf) ☺ ☺ ☺ V ☺ ☺ ☺ ☺ ☺ ☺ ☺ ☺ I’m checking the difference in energy (per coulomb) between the 2 red arrows 1 Volt = 1 Joule per coulomb

24. Voltage (p.d.) ☺ ☺ ☺ V ☺ ☺ ☺ ☺ ☺ ☺ ☺ ☺ I’m checking the difference in energy (per coulomb) before and after the lamp 1 Volt = 1 Joule per coulomb

25. Voltage is the energy transferred per charge