R1=12,r2=7,r3=12,r4=14,r5=5 berpakah rt

Dik : rangkaian paralel
R1 = 12 ohm, R2 = 7 ohm, R3 = 12 ohm, R4 = 14 ohm, R5 = 5 ohm
Dit : R total
Jawab :
1/Rtotal = 1/R1 + 1/R2 + 1/R3 + 1/R4 + 1/R5
1/Rtotal = 1/12 + 1/7 + 1/12 + 1/14 + 1/5
1/Rtotal = 2/12 + 1/7 + 1/14 + 1/5
Samakan penyebutnya
KPK dari 12, 7, 14, dan 5 adalah 420
12 × 35 = 420
7 × 60 = 420
14 × 30 = 420
5 × 84 = 420

1/Rtotal = 2(35)/12(35) + 1(60)/7(60) + 1(30)/14(30) + 1(84)/5(84)
1/Rtotal = 70/420 + 60/420 + 30/420 + 84/420
1/Rtotal = (70+60+30+84)/420
1/Rtotal = 244/420
Rtotal = 420/244
Rtotal = 1,7 ohm