Peak-to-Peak, RMS Voltage, and Power - PCARAn9xh.org/License/PCARA_General_Upgrade_Lesson_07.pdf•...
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Peak-to-Peak, RMS Voltage, and Power
Where’s my notes from last week!
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Alternating Current Defined
• In alternating current (ac), electrons flow back and forth through the conductor with some periodicity.
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AC Vocabulary
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Power in ACFinding the Effective Voltage
• The voltage used in power calculations in ac is the equivalent dc voltage value that would do the same amount of work (or heat) .
• A simple average of ac voltage is not quite good enough.
• A weighted average called Root Mean Square (RMS) is more accurate.
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Okay – Important Points about RMS
• RMS is the equivalent value of dc voltage to do the same work.
• RMS is used in Power and Ohms Law formulas.
• The RMS voltage is 0.707 times the peak voltage.
• AC volt meters measure RMS voltage!!!!!
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Converting Peak Voltage to RMS
Remember:
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How to Use the Math
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How to Use the Math
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How to Use the Math