Which of the following relationship is valid for the equilibrium position of the float in a Rotameter? (Where, Df= Drag force on the float Bf = Buoyant force on the float Wf = Weight of the float)?
A. Df + Bf + Wf =0
B. Df + Bf = Wf
C. None of these
D. Df = Bf + Wf
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