Energy stored by a capacitor (AQA A-Level Physics): Flashcards

Electrical energy

Area under $Q$-$V$ graph

Straight line through origin

$E = \frac{1}{2}QV$

$E = \frac{1}{2}CV^2$

$E = \frac{Q^2}{2C}$

Joules ($J$)

When charge and potential difference are known

When capacitance and potential difference are known

When charge and capacitance are known