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U=230V
t=150h=540000s
I=0,4A
szukane:
P=?
R=?
q=?[C]
W=?[kWh]
P=U * I
P=230V*0,4A
P=92W
R=U/I
R=230V/0,4A
R=575om
I=q/t
q=I *t
q=0,4A*540000s
q=216000C
P=W/t
W=P*t
W=92W*150h
W=13800Wh=13,8kWh