nilai arus listrik yang melewati rangkaian sebesar......A

hambatan pd paralel
1/Rp = 1/R1 + 1/R2
         = 1/20 + 1/30
         = 3/60 + 2/60
         = 5/60
Rp = 60/5 = 12

R total = 12+12 = 24 ohm

I=V/R
 = 12/24
 = 0.5 Ampere (a)