Learning Voltage & Current RMS Calculations - Using Practical Electronics for Inventors Book - #6

Super happy I've been able to grasp the concepts of RMS voltage and current. My first lecture 2 weeks ago was on this and I was mad confused. I look forward to learning more now.

The term “RMS” stands for “Root-Mean-Squared”. Most books define this as the “amount of AC power that produces the same heating effect as an equivalent DC power”, or something similar along these lines, but an RMS value is more than just that. The RMS value is the square root of the mean (average) value of the squared function of the instantaneous values. The symbols used for defining an RMS value are VRMS or IRMS.

The term RMS, ONLY refers to time-varying sinusoidal voltages, currents or complex waveforms were the magnitude of the waveform changes over time and is not used in DC circuit analysis or calculations were the magnitude is always constant.

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