WB JEE 2025 | Properties of Matter Question 7 | Physics

WB JEE 2025

MCQ (Single Correct Answer)

-0.25

Three different liquids are filled in a U-tube as shown in figure. Their densities are $\rho_1, \rho_2$ and $\rho_3$ respectively. From the figure we may conclude that

$p_3=4\left(\rho_2-\rho_1\right)$

$\rho_3=4\left(\rho_1-\rho_2\right)$

$\rho_3=2\left(\rho_2-\rho_1\right)$

$\rho_3=\frac{\rho_1+\rho_2}{2}$

WB JEE 2025

MCQ (Single Correct Answer)

-0.5

A piece of granite floats at the interface of mercury and water contained in a beaker as in figure. If the densities of granite, water and mercury are $\rho, \rho_1$ and $\rho_2$ respectively, the ratio of the volume of granite in water to the volume of granite in mercury is

$\frac{\rho_2-\rho}{\rho-\rho_1}$

$\frac{\rho_2+\rho}{\rho_1+\rho}$

$\frac{\rho_1 \rho_2}{\rho}$

$\frac{\rho_1}{\rho_2}$

WB JEE 2025

MCQ (Single Correct Answer)

-0.5

The apparent coefficient of expansion of a liquid, when heated in a copper vessel is $C$ and when heated in silver vessel is $S$. If $A$ is linear coefficient of expansion of copper, then linear coefficient of expansion of silver is

$\frac{C-S-3 A}{3}$

$\frac{C+3 A-S}{3}$

$\frac{S+3 A-C}{3}$

$\frac{C+S+3 A}{3}$

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

The elastic potential energy of a strained body is

stress $$\times$$ strain

stress / strain

stress $$\times$$ strain / volume

$$\frac{1}{2} \times$$ stress $$\times$$ strain $$\times$$ volume

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