- Two metal plates close to each other with an insulator (the dielectric) between them will store an electric charge. This ability is known as capacitance
- The unit of capacitance is the Farad (F) but as this is a very large unit the micro-, nano- and pico-Farad (μF, nF, pF) are used
- Capacitance depends on
- the area (A) of the plates,
- the distance between them (d), and
- the dielectric constant (K) of the material between them
- C = KA÷d