Tiga resistor dirangkai seperti pada gambar di samping. Pada rangkaian mengalir arus 3A. Nilai hambatan R adalah... (paralel 8ohm, 32ohm( (30volt)

LISTRIK DINAMIS
• Rangkaian Arus Searah

R₁ = 8 ohm
R₂ = 32 ohm
R₃ = R
V = 30 V
i = 3 A
R = ___?

Hambatan total
V = i R₁₂₃
30 = 3 • R₁₂₃
R₁₂₃ = 10 ohm

R₁ dan R₂ tersusun paralel
1/R₁₂ = 1/R₁ + 1/R₂
1/R₁₂ = 1/8 + 1/32
1/R₁₂ = 4/32 + 1/32
1/R₁₂ = 5/32
R₁₂ = 32/5 = 6,4 ohm

R₁₂ dan R₃ tersusun seri
R₁₂₃ = R₁₂ + R₃
10 = 6,4 + R
R = 3,6 ohm ← jwb