Energy Formula Calculation

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 = V²t / R = VIt = I²tR

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 = V²tG = VIt = I²t / G

The energy W stored in a capacitance C holding voltage V with charge Q is:

W = CV² / 2 = QV / 2 = Q² / 2C

The energy W stored in an inductance L carrying current I with magnetic linkage Y is:

W = LI² / 2 = YI / 2 = Y² / 2L.