1. Charge, current and pd
   1. Define current
   2. Define pd
   3. Define resistance
2. Current/voltage characteristics
   1. Resistor or wire
   2. Semiconductor diode
   3. Filament lamp (non-ohmic conductor)
   4. Ohm's law
3. Resistivity
   1. Define resistivity
   2. Measuring resistivity
   3. Temperature and resistance in conductors and thermistors
   4. Superconductors
4. Circuits
   1. Series resistor circuits
   2. Parallel resistor circuits
   3. Energy and power in d.c. circuits
   4. Power
   5. Conservation of charge and energy in circuits
5. Potential divider
   1. How it works
   2. Using sensors as part of potential dividers
6. Electromotive force and internal resistance
   1. Define internal resistance
   2. Define emf
   3. Measuring emf and internal resistance of a cell
7. Alternating currents
   1. r.m.s.
   2. Peak value
   3. Time period
   4. Frequency
8. Oscilloscope
   1. How to read one
   2. Measuring voltage
   3. Measuring period and frequency
   4. Time intervals