EEK! #6 - AC Power, RMS, & VA vs W
3 years ago
69
You probably do this all the time, but you don't even know it.
I'm talking about AC power calculations with P = V x I.
Technically, it works. But when you think about it, it shouldn't. AC has constantly changing voltage and current over time - unlike DC.
So how on earth does it work?
Well, the short version is: RMS, or root mean square!
The long version involves a (simplified) explanation of AC power involving Watts, Volt-Amperes, and Power Factor.
But not to worry: At the end of the day, you can safely use P = V x I with AC, and you'll still end up with a result that's close enough for horseshoes!
More techie tips: https://scottiestech.info
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