I have this electricity question in my exam:
"A manufacturing plant uses 2.1 MW of 220-V single phase power at a power factor of 0.8. Determine the apparent power and the effective, or rms, value of the current."
Getting the apparent power was simple, you just have to divide the true power by the power factor (which, in this case, gave you 2.625 MW), but I'm a bit confused as to the rms value.
To get the rms, you need the peak wave value (or the peak-to-peak value). I'm not sure how to get it. Could it be the amperage itself? Or maybe the voltage?
2007-12-20
11:00:54
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4 answers
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asked by
Atomic Collision
2
in
Science & Mathematics
➔ Engineering
Yes, sorry about that. I put it in VA in as the answer. But, is the current the peak value? Or is it the peak-to-peak value? Or is it none of those?
2007-12-20
11:17:21 ·
update #1
All that they gave me was the wattage, voltage, and the power factor. Is the peak value of the voltage simply the voltage itself? Because that would seem logical.
2007-12-20
11:27:48 ·
update #2