$\definecolor{red}{RGB}{255,0,0}$$\definecolor{black}{RGB}{0,0,0}$
R
R
R
R
=
R
1
+R
2
R
=
U / I
R
1
R
1
R
1
R
1
=
R-R
2
R
1
=
U
1
/I
R
2
R
2
R
2
R
2
=
R-R
1
R
2
=
U
2
/I
U
U
U
U
=
U
1
+U
2
U
=
R·I
U
1
U
1
U
1
U
1
=
U-U
2
U
1
=
R
1
·I
U
2
U
2
U
2
U
2
=
U-U
1
U
2
=
R
2
·I
I
I
I
I
=
U / R
I
=
U
1
/ R
1
I
=
U
2
/ R
2
: Widerstände in Reihe, gleichwertiger Widerstand
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