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Lösning 4.4:10

FörberedandeFysik

(Skillnad mellan versioner)
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Rad 9: Rad 9:
<math>500 = 230^2 \cdot 17,1/Z^2</math><br\>
<math>500 = 230^2 \cdot 17,1/Z^2</math><br\>
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Z = 42,5 cos¶=17;1=42;5=0;40Z=pR2+!2L242;5=p17;12+3142L2
+
<math>Z = 42,5 \Omega</math> <math>\cos\phi = 17,1/42,5 = 0,40</math><br\>
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L=0;123H
+
 
 +
<math>Z = \sqrt{R^2 + \omega ^2 L^2}</math> <math>42,5 = \sqrt{17,12 + 314^2L^2}</math><br\>
 +
 +
<math>L = 0,123 H</math>

Versionen från 26 januari 2010 kl. 10.38

U=230V P=500W R=171

P=UIcos cos=URUZ=RIZI=RZ

=314rads

U=IZ P=UIRZ=U2RZ2

500=2302171Z2

Z=425 cos=171425=040

Z=R2+2L2  425=1712+3142L2 

L=0123H