JEE Main 2022 (Online) 26th June Evening Shift | Properties of Matter Question 193 | Physics

If p is the density and $$\eta$$ is coefficient of viscosity of fluid which flows with a speed v in the pipe of diameter d, the correct formula for Reynolds number R_e is :

$${R_e} = {{\eta d} \over {\rho v}}$$

$${R_e} = {{\rho v} \over {\eta d}}$$

$${R_e} = {{\rho vd} \over \eta }$$

$${R_e} = {\eta \over {\rho vd}}$$

JEE Main 2022 (Online) 25th June Morning Shift

MCQ (Single Correct Answer)

-1

The terminal velocity (v_t) of the spherical rain drop depends on the radius (r) of the spherical rain drop as :

r^1/2

r²

r³

JEE Main 2022 (Online) 24th June Evening Shift

MCQ (Single Correct Answer)

-1

Potential energy as a function of r is given by $$U = {A \over {{r^{10}}}} - {B \over {{r^5}}}$$, where r is the interatomic distance, A and B are positive constants. The equilibrium distance between the two atoms will be :

$${\left( {{A \over B}} \right)^{{1 \over 5}}}$$

$${\left( {{B \over A}} \right)^{{1 \over 5}}}$$

$${\left( {{2A \over B}} \right)^{{1 \over 5}}}$$

$${\left( {{B \over 2A}} \right)^{{1 \over 5}}}$$

JEE Main 2022 (Online) 24th June Morning Shift

MCQ (Single Correct Answer)

-1

The bulk modulus of a liquid is 3 $$\times$$ 10¹⁰ Nm^$$-$$2. The pressure required to reduce the volume of liquid by 2% is :

3 $$\times$$ 10⁸ Nm^$$-$$2

9 $$\times$$ 10⁸ Nm^$$-$$2

6 $$\times$$ 10⁸ Nm^$$-$$2

12 $$\times$$ 10⁸ Nm^$$-$$2