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The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and T₂ = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)

A. T₁/T₂ = μθ

B. log (T₁/T₂) = μθ

C. T₁/T₂ =eμθ

D. T₁/T₂ = log μθ

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