What is the physical significance of RMS?
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RMS can be defined as the effective value of a varying voltage or current. ... RMS value of an AC voltage/current is equivalent to the DC voltage/current that produces the same heating effect when applied across an identical resistor. Hence, it is also a measure of energy content in a given signal.
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if we passed RMS i through the resistor it will produce the same thermal energy in a time period as that produced when the alternating current i passes through it.
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