If you are resitting the unit 2 NAB next Wednesday (29th April), you might want to look at the following revision sites:
TPD, EMF and internal resistance
Unit 2 summary (Powerpoint)
Whole course summary notes (pdf)
St. Kentigern’s Academy Notes: unit 2.1, unit 2.2, unit 2.3, unit 2.4, revision questions, answers to revision questions