Odpowiedzi

2009-12-05T12:37:43+01:00
Η=Wu*100%/Wc
Wc=Wu*100%/η=9000J*100%/80%=11250J=11250Ws
Wc=U*I*t
I=Wc/(U*t)=11250Ws/(220V*15s)=3,41A
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