Physics · Theme B: The particulate nature of matter

B.5 — Current and circuits

Physics · SL / HL · syllabus-mapped notes

1. Charge, current and potential difference

   Cells and emf, current as a flow of charge, potential difference, and conductors vs insulators.

2. Resistance, Ohm’s law and power

   Resistance and resistivity, Ohm’s law, ohmic vs non-ohmic behaviour, and electrical power.

3. Series, parallel and internal resistance

   Combining resistors in series and parallel, emf with internal resistance, and variable resistors.