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U=R*I
I=2,3 A
R=100 Ω
U=100*2,3
U=230 V
2.
I=U/R
R=1150 Ω
U=230 V
I=230/1150
I=0,2 A=200 mA
U= R × I
U= 100om × 2.3A
U= 230 V
2. R= U / I / × I
R × I = U / ÷ R
I = U/R
I = 230V ÷ 1150om = 0.2 A