CUET Preparation Today
If pv = 81, then $\frac{dp}{dv}$ at v = 9 is : |
1 -1 2 None of these |
-1 |
$p v=81 \Rightarrow p=\frac{81}{v} \Rightarrow \frac{d p}{d v}=-\frac{81}{v^2}$ ⇒ For v = 9, $\frac{d p}{d v}=-\frac{81}{81}=-1$ Hence (2) is correct answer. |
