How much real power is consumed in a circuit consisting of a 100-ohm resistor in series with a 100-ohm inductive reactance drawing 1 ampere?

Erklärung

Only the resistance consumes real power; the inductive reactance stores and returns energy without dissipating any. With one ampere flowing through the 100 Ω resistor the dissipated power is the current squared times that resistance, or 100 watts.