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1/Rt= 1/5 + 1/4 + 1/8
= (8+10+5)/40
= 23/40
Rt= 40/23 ohm
I = V/R
= 12/40/23
= 12 * 23/40
= 6,9 A
1/Rp=1/5+1/4+1/8
1/Rp=8+10+5/40
1/Rp=23/40
Rp=40/23 ohm
I=V÷R
=12v÷40/23
=12×23/40=69/10=6,9 ampere