# Power (Ch.2)

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The flashcards below were created by user abalter on FreezingBlue Flashcards.

1. Xrms = ?
Xmax/sqrt(2)
2. ej*theta = ?
cos(theta)+jsin(theta)
3. XL = ?
w*L

(w is omega)
4. Xc = ?
1/(w*C)

(w is omega)
5. P is called:
average power, real power, active power
6. P = ?
VIR = VIcos(d-b)

(d-b) is the difference in angles between V and I
7. pR(t) = ?
VIR{1+cos[2(wt+d)]}
8. pL(t) = ?
VILsin[2(wt+d)]
9. pC(t) = ?
-VICsin[2(wt+d)]
10. Q is called ________ and measured in ________.
reactive power; var
11. Q = ?
VIsin(d-b)
12. pf = ?
cos(d-b) = P/S = P/sqrt(P^2+Q^2)
13. In a capacitive circuit, p.f. is ________.
lagging
14. In an inductive circuit, p.f. is ________.
15. |S| is called ________ and measured in ________.
apparent power; VA
16. S is called ________ and measured in ________.
complex power; VA
17. S = ?
VI* = VI<d-b = VIcos(d-b)+jVIsin(d-b) = P+jQ
18. |S| = ?
sqrt(P^2+Q^2)

## Card Set Information

 Author: abalter ID: 99496 Filename: Power (Ch.2) Updated: 2011-09-02 16:57:57 Tags: equation power definition Folders: Description: equations/information for Power System Analysis Show Answers:

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