question_answer

The critical pressure ratio \[\left( \frac{{{p}_{2}}}{{{p}_{1}}} \right)\] for maximum discharge through a nozzle is:

A) \[{{\left( \frac{2}{n+1} \right)}^{\left( \frac{n\,\,-\,\,1}{n} \right)}}\]                   

B) \[{{\left( \frac{2}{n+1} \right)}^{\left( \frac{n}{n\,\,-\,\,1} \right)}}\]

C) \[{{\left( \frac{2}{n-1} \right)}^{\left( \frac{n}{n\,\,+\,\,1} \right)}}\]                    

D) \[{{\left( \frac{2}{n-1} \right)}^{\left( \frac{n\,\,+\,\,1}{n} \right)}}\]