soal fisika cara cariknya

1.
Rangkaian seri
Rs = R1 + R2 + R3
Rs = 6 + 6 + 6
Rs = 18 Ohm

V = I . R
9 = I . 18
I = 9/18 = 0,5 Ampere

2.
Rangkaian Campuran (R seri dan R pararel)
Hambatan Seri :
Rs = R1 + R2
Rs = 3 + 3
Rs = 6 Ohm

kemudian di pararelkan :
Rp = 1/Rs + 1/R3
Rp = 1/6 + 1/6
Rp = 2/6 = 1/3
Rp = 3 Ohm

3. Hambatan R1, R2 dan R3 tersusun Seri :
Rs = R1 + R2 + R3
Rs = 2 + 6 + 8
Rs = 16 Ohm

V = I . R
20 = I . 16
I = 20/16
I = 5/4 A
I = 1,25 Ampere