Lösning 4.4:10
FörberedandeFysik
(Skillnad mellan versioner)
Rad 1: | Rad 1: | ||
- | <math>U = 230 V</math> <math>P = 500 W</math> <math>R = 17,1 \Omega | + | <math>U = 230 V</math> <math>P = 500 W</math> <math>R = 17,1 \Omega</math><br\> |
- | <math>\omega = 314 rad/s</math> <math>U = I\cdot Z</math> <math>P=UI\cdot R/Z = U^2R/Z^2</math> | + | <math>P = UI\cdot \cos\phi</math> <math>\cos\phi = U_R/U_Z = RI /ZI = R/Z </math><br\> |
+ | |||
+ | <math>\omega = 314 rad/s</math><br\> | ||
+ | |||
+ | <math>U = I\cdot Z</math> <math>P=UI\cdot R/Z = U^2R/Z^2</math><br\> | ||
+ | |||
+ | <math>500 = 230^2 \cdot 17,1/Z^2</math><br\> | ||
- | Z=42 | + | Z = 42,5 cos¶=17;1=42;5=0;40Z=pR2+!2L242;5=p17;12+3142L2 |
L=0;123H | L=0;123H |
Versionen från 26 januari 2010 kl. 10.35
\displaystyle U = 230 V \displaystyle P = 500 W \displaystyle R = 17,1 \Omega
\displaystyle P = UI\cdot \cos\phi \displaystyle \cos\phi = U_R/U_Z = RI /ZI = R/Z
\displaystyle \omega = 314 rad/s
\displaystyle U = I\cdot Z \displaystyle P=UI\cdot R/Z = U^2R/Z^2
\displaystyle 500 = 230^2 \cdot 17,1/Z^2
Z = 42,5 cos¶=17;1=42;5=0;40Z=pR2+!2L242;5=p17;12+3142L2 L=0;123H