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Lösning 4.4:10

FörberedandeFysik

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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