The formula for calculating the effective current is as follows: I RMS, √ 1 T ∫ TI t where T is the period of the current waveform and I t is the instantaneous current at time t; Jace Curtis of Longview was looking for an rms homework assistant. Gilbert Anderson found the answer to a search query. The RMS value is important in electrical engineering because it is used to calculate the power of an AC signal. It is also used in various calculations related to electrical circuits, such as determining the resistance of a circuit or the voltage drop across a component. Engineering Homework Help and Comp Sci K. Homework Statement How big an inductor should be connected in series with a bulb Volt, RMS if it is to operate normally when the combination is connected across Volt, line. First determine the required inductive reactance. You risk neglecting the resistance of.