The power **P** dissipated by a resistance **R** carrying a current **I** with a voltage drop **V** is:
**P = V**^{2} / R = VI = I^{2}R
Similarly, the power **P** dissipated by a conductance **G** carrying a current **I** with a voltage drop **V** is:
**P = V**^{2}G = VI = I^{2} / G
The power **P** transferred by a capacitance **C** holding a changing voltage **V** with charge **Q** is:
**P = VI = CV(dv/dt) = Q(dv/dt) = Q(dq/dt) / C**
The power **P** transferred by an inductance **L** carrying a changing current **I** with magnetic linkage **Y** is:
**P = VI = LI(di/dt) = Y(di/dt) = Y(dy/dt) / L** |