R₁ = 6Ω, R₂ = 3Ω, R₃ = 9Ω.
He transformed the circuit. Redrew it. The bridge simplified into a series-parallel. Then Kirchhoff's loop rule — two equations, two unknowns. dse physics mock paper
Ming had laughed then. He wasn't laughing now. R₁ = 6Ω, R₂ = 3Ω, R₃ = 9Ω