Perhatikan rangkaian listrik arus searah di bawah ini. Hitung besar dayanya
1/R.p = 1/6 + 1/12
1/Rp = (2+1)/12
Rp = 12/3
Rp = 4 ohm
Rs1 = Rp + 4 ohm = 4+4 = 8 ohm
Rs2 = 3 ohm + 5 ohm = 8 ohm
R.total =
1/R.tot = 1/Rs1 + 1/Rs2
1/R.tot= 1/8 + 1/8
R.tot= 8/2 = 4 ohm
kuat arus yg mengalir hamb.3 ohm =
I = V/R.tot = 12/4 = 3 Ampere
daya listrik =
P = V x I
P = 12 v x 3 A
P = 36 watt