Passives

Resistors

$$C = \frac{Q}{V}$$ $$U = \frac{1}{2} C V^2$$ $$i = C \frac{dv}{dt}$$

Parallel Plate Capacitor:

$$C = \frac{\epsilon A}{d}$$

$$U = \frac{1}{2} L I^2$$ $$v = L \frac{di}{dt}$$