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U=220[V];
F=800[N];
t=5[min]=300[s]:
Wzory:
W=U*I*t;
W=F*h;h=30[m];
U*I*t=F*h;
Szukane:
I=?[A];
I=(F*h)/U*t;
Jednostka:
[I]=[N*m/V*s]=[J/V*s]=[A];
Obliczenia:
I=(800*30)/220*300;
I=24000/66000;
I=0,4[A].
Odp.Natężenie I=0,4[A].