The energy **W** consumed over time **t** due to power **P** dissipated in a resistance **R** carrying a current **I** with a voltage drop **V** is:
**W = Pt = V**^{2}t / R = VIt = I^{2}tR
Similarly, the energy **W** consumed over time **t** due to power **P** dissipated in a conductance **G** carrying a current **I** with a voltage drop **V** is:
**W = Pt = V**^{2}tG = VIt = I^{2}t / G
The energy **W** stored in a capacitance **C** holding voltage **V** with charge **Q**
is:
**W = CV**^{2} / 2 = QV / 2 = Q^{2} / 2C
The energy **W** stored in an inductance **L** carrying current **I** with magnetic linkage **Y** is:
**W = LI**^{2} / 2 = YI / 2 = Y^{2} / 2L. |