P=110 W
U=220 V
a)
R=?
R=U/I
I=?
P=U*I
I=P/U
I=110/220
I=0,5 A
R=220/0,5
R=440 Ω
b)
U=110 V
P=110*0,5
P=55 W
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P=110 W
U=220 V
a)
R=?
R=U/I
I=?
P=U*I
I=P/U
I=110/220
I=0,5 A
R=220/0,5
R=440 Ω
b)
U=110 V
P=110*0,5
P=55 W