a. Penyelesaian

Rtotal = R1+R2+R3+R4

Rtotal = 3 ohm + 6 ohm + 9 ohm + 12 ohm = 30 ohm

b. Penyelesaian

Rangkaian kan seri, maka arusnya sama dong.

Pakai arus total aja karena R dan V total

Arus total = Vtotal/Rtotal

Arus total = 12 V / 30 Ohm

Arus total = 0.4 ampere

c. Penyelesaian

Tegangan beda2 ini :

Lampu 1

V1 = I total x R1

(kenapa pakai I total haruse kan I 1 karena semua I di satu jalur sama say)

V1 = 0.4 A x 3 Ohm = 1.2 V

Lampu 2

V2= I total x R2

V2 = 0.4 A x 6 Ohm = 2.4 V

Lampu 3

V3 = I total x R3

V3 = 0.4 A x 9 Ohm = 3.6 V

Lampu 4

V4 = I total x R4

V4 = 0.4 A x 12 Ohm = 4.8 V

Ngeceknya V1+V2+V3+V4 = 12 V sama kan sama V total.

DONE

CMIIW. Semoga membantu.

By Mr Zeo