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Hk I Kirchhoff di titik B
i1 + i2 = i3
→ i3 = i3 - i1 ••• pers 1
Hk II Kirchhoff
ΣE + ΣiR = 0
loop 1:
3 i1 + 6 i3 = 6
i1 + 2 i3 = 2 ••• pers 2
loop 2:
4 i2 + 6 i3 = -6
2 i2 + 3 i3 = -3
2 (i3 - i1)+ 3 i3 = -3
2 i3 - 2 i1 + 3 i3 = -3
-2 i1 + 5 i3 = -3 ••• pers 3
Diperoleh 3 pers linear dalam 3 var (SPLTV)
Penelesaian dapat langsung dengan kalkulator atau secara manual
Eliminasi
|×2| 2 i1 + 4 i3 = 4
|×1| -2 i1 + 5 i3 = -3
---------------------------- +
9 i3 = 1
i3 = 1/9 A ← jwb
Substitusi
i1 + 2 i3 = 2
i1 + 2 (1/9) = 2
i1 = 2 - 2/9
i1 = 16/9 A ← jwb
i1 + i2 = i3
16/9 + i2 = 1/9
i2 = -15/9 = - 5/3 A ← jwb
jawaban
i1 = 16/9 A, menuju titik B
i2 = 5/3 A, menjauhi titik B
i3 = 1/9 A, menjauhi titik B