tolong ua nomor 14 beserta caranya

*R2 dan R3 >>> paralel
1/Rp = 1/R2 + 1/R3
1/Rp = 1/15 + 1/30
1/Rp = 2/30 + 1/30
Rp = 30/3 = 10 ohm

*lihat R1 dan Rp >>> seri
Rtotal = R1 + Rp = 20 + 10 ohm = 30 ohm

Jadi arus listrik (I)
I = Vtotal / Rtotal
I = 45 volt / 30 Ohm
I = 1,5 ampere

*V pada Rp
V = I . Rp
V = 1,5 . 10
V = 15 Volt

Jawaban A :)