JEE Main 2020 (6 Sep, Shift 2) Physics Q7: Fluid Dynamics

Question

A fluid is flowing through a horizontal pipe of varying cross-section, with speed

v\,\mathrm{ms^{-1}}

at a point where the pressure is P Pascal. At another point where pressure is

\frac{P}{2}

Pascal its speed is

V\,\mathrm{ms^{-1}}

. If the density of the fluid is

\rho\,\mathrm{kg\,m^{-3}}

and the flow is streamline, then V is equal to :

Official answer

Option 1

NTA final key (Sep 2020).

Accepted Answer

Option 1: $\sqrt{\frac{P}{\rho}+v^2}$

Answer

$\sqrt{\frac{P}{\rho}+v^2}$

Answer

$\sqrt{\frac{2P}{\rho}+v^2}$

Answer

$\sqrt{\frac{P}{\rho}+v}$

Answer

$\sqrt{\frac{P}{2\rho}+v^2}$

JEE Main 6 September 2020, Shift 2, Physics Q7