Odpowiedzi

2010-04-14T21:58:37+02:00
Z1=2000
z2=400
R2=20Ω
I2=0,2A
U1=?
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U2=I2*R2=0,2A*20Ω=4V
z1/z2=U1/U2
U1=z1*U2/z2=2000*4V/400=20V