• # question_answer Which one of the following expresses the error in discharge due to error in the measurement of head over a triangular notch? A) $\frac{dQ}{Q}=\frac{5dH}{2H}$                     B) $\frac{dQ}{Q}=\frac{3dH}{2H}$C) $\frac{dQ}{Q}=\frac{7dH}{2H}$                     D) $\frac{dQ}{Q}=\frac{1dH}{2H}$

For a triangular notch. $Q\propto {{H}^{5/2}}$ $In\,Q=\frac{5}{2}\,In\,H$ $\frac{dQ}{Q}=\frac{5}{2}=\frac{dH}{H}$