Tentukan hambatan pengganti padavrangkaian berikut!

[tex]a) \: r = 4 + 6 + 3 = 13 \\ b) \: \frac{1}{r} = \frac{1}{5} + \frac{1}{7} = \frac{12}{35} .... > \: r = \frac{35}{12} = 2 \frac{11}{12} \: ohm \\ maka \: hambatan \: pengganti \: = 3 + 2 \frac{11}{12} = 5 \frac{11}{12} \: ohm[/tex]