Key Equations
Electric Fields - OCR A-Level Physics
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$$E = \frac{F}{Q}$$
$$E = \frac{V}{d}$$
$$F = \frac{Q_1 Q_2}{4\pi\epsilon_0 r^2}$$
$$E = \frac{Q}{4\pi\epsilon_0 r^2}$$
$$V = \frac{Q}{4\pi\epsilon_0 r}$$
$$W = Q\Delta V$$
$$E = -\frac{dV}{dr}$$