oblicz opor grzalki czajnika elektrycznego o mocy 2200w podlaczonego do napiecia 220v
P-U*I /:U
P/U-I
2200/220 -I
10A-I
P-R*II /:II
P/II-R
2200/10-R
R-220 omów
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P-U*I /:U
P/U-I
2200/220 -I
10A-I
P-R*II /:II
P/II-R
2200/10-R
R-220 omów