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Lösning 4.4:10

FörberedandeFysik

(Skillnad mellan versioner)
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Rad 1: Rad 1:
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<math>U = 230 V</math> <math>P = 500 W</math> <math>R = 17,1 \Omega</math> <math>P = UI\cdot \cos\phi</math> <math>\cos\phi = U_R/U_Z = RI /ZI = R/Z </math><br\>
+
<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>500 = 230^2 \cdot 17,1/Z^2</math><br\>
+
<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\>
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Z=42;5Êcos¶=17;1=42;5=0;40Z=pR2+!2L242;5=p17;12+3142L2
+
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

U=230V P=500W R=171

P=UIcos cos=URUZ=RIZI=RZ

=314rads

U=IZ P=UIRZ=U2RZ2

500=2302171Z2

Z = 42,5 cos¶=17;1=42;5=0;40Z=pR2+!2L242;5=p17;12+3142L2 L=0;123H