besar tegangan V pd rangkaian tersebut

V = I.R
Rp = 1/rp = 1/30 + 1/60+ 1/20
1/rp = 6/60
rp = 10 ohm

I = 0,5 A
Rtotal = 10 + 10 = 20 ohm
V= 0,5 x 20
V = 10 Volt

maaf jika salah