Physics · A-Level · AQA · AQA A-level Physics (7408) · Specification point · 3.7.4.4 · Fields and their consequences (A-level only) · Capacitance (A-level only)
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3.7.4.4 Capacitor charge and discharge (A-level only)
| Content | Opportunities for skills development |
|---|---|
Graphical representation of charging and discharging of capacitors through resistors. Corresponding graphs for Q, V and I against time for charging and discharging. Interpretation of gradients and areas under graphs where appropriate. Time constant RC. Calculation of time constants including their determination from graphical data. Time to halve, |
Quantitative treatment of capacitor discharge,
Use of the corresponding equations for V and I.
Quantitative treatment of capacitor charge,
Required practical 9: Investigation of the charge and discharge of capacitors. Analysis techniques should include log-linear plotting leading to a determination of the time constant, RC | MS 3.8, 3.10, 3.11 / PS 2.2, 2.3 / AT f, k |