Extra exam question E5D11

WhyA circuit with a 100-ohm resistor in series with 100 ohms of inductive reactance, drawing 1 ampere, consumes 100 watts of real power. Real power in a series RLC-type circuit is dissipated only in the resistive part, so with 1 ampere flowing through the 100-ohm resistor, real power consumed is I squared times R, or 1 squared times 100, which is 100 watts, answer B. The inductive reactance doesn't consume any real power on its own, so the higher figures that would come from including it in the power calculation, or the lower figure from an incomplete calculation, don't apply here.