Physics · Current Electricity

Three resistors A (12 Ω), B (18 Ω) and C (36 Ω) are connected in parallel. This combination is connected in series to three other resistors D (12 Ω), F (18 Ω) and G (36 Ω) and a 12 V battery of negligible internal resistance. Let PB and PF be the rate of energy dissipated in resistors B and F, respectively. Then the ratio (PB / PF) is: