Resistance per unit length of ring,Length of sections ADB and ACB are rθ and r(2π − θ)∴ Resistance of section ADB,and resistance of section ACB,R2 = ρr(2π − θ)=Now, R and R2 are connected in parallel between A and B then=Putting θ = 45= π/4 rad and R = 15Ω== 1.64Ω
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Resistance per unit length of ring,Length of sections ADB and ACB are rθ and r(2π − θ)∴ Resistance of section ADB,and resistance of section ACB,R2 = ρr(2π − θ)=Now, R and R2 are connected in parallel between A and B then=Putting θ = 45= π/4 rad and R = 15Ω== 1.64Ω