kak tolong bantuannya, jawab soal A-D

a. Rtotal =R1+R2+R3+R4+R5
=4+10+15+20+5
=54 ohm

b. 1/Rtotal = 1/R1 +1/R2
=1/12 + 1/6
=1/12 + 2/12
=3/12
Rtotal=12/3=4 ohm

c. 1/Rtotal1 =1/R2+1/R3
=1/2+1/2
=2/2
=1
Rtotal1 =1 ohm

Rtotal2=R7+R8
=2+2
=4 ohm

1/Rtotal3= 1/R6+1/Rtotal2
=1/4+1/4
=2/4
Rtotal3=4/2=2 ohm

Rtotal semua=R1+Rtotal1+R4+R5+Rtotal3
=2+1+2+2+2
=9 ohm

d. 1/Rtotal1=1/R3+1/R4+1/R5
=1/30+1/15+1/15
=1/30+2/30+2/30
=5/30
Rtotal1=30/5=6 ohm

Rtotal semua = R1+R2+Rtotal1+R6+R7
=5+10+6+5+5
=31 ohm