WB JEE 2026 | Properties of Matter Question 8 | Physics

WB JEE 2026

MCQ (More than One Correct Answer)

-0.25

Two spherical soap bubbles of radii $r_1$ and $r_2$ in vaccum coalesce under isothermal condition．The newly formed bubble has a radius（ $r$ ）given by

$r_1+r_2$

$\frac{r_1+r_2}{2}$

$\frac{r_1 r_2}{r_1+r_2}$

$\sqrt{r_1^2+r_2^2}$

WB JEE 2026

MCQ (More than One Correct Answer)

-0.25

A pipe $A$ is connected with other pipes $B$ and $C$ as shown in the figure．The areas of cross－section of $A, B$ and $C$ are respectively $\alpha, \frac{\alpha}{2}$ and $\frac{\alpha}{4}$ ．If the velocities of flow of water through $A$ and $B$ are $10 \mathrm{~m} / \mathrm{sec}$ and $6 \mathrm{~m} / \mathrm{sec}$ ，respectively，then velocity of flow，$V_c$ along $C$ is

$21 \mathrm{~m} / \mathrm{sec}$

$12 \mathrm{~m} / \mathrm{sec}$

$28 \mathrm{~m} / \mathrm{sec}$

$18 \mathrm{~m} / \mathrm{sec}$

WB JEE 2022

MCQ (More than One Correct Answer)

-0

WB JEE 2022 Physics - Properties of Matter Question 17 English

Two wires A and B of same length are made of same material. Load (F) vs. elongation (x) graph for these two wires is shown in the figure. Then which of the following statement(s) is/are true?

The cross-section area of A is greater than that of B.

Young's modulus of A is greater than Young's modulus of B.

The cross-sectional area of B is greater than that of A.

Young's modulus of both A and B are same.

WB JEE 2016

MCQ (More than One Correct Answer)

-0

A drop of water detaches itself from the exit of a tap when ($$\sigma$$ = surface tension of water, $$\rho$$ = density of water, R = radius of the tap exit, r = radius of the drop)

$$r > {\left( {{3 \over 2}{{R\sigma } \over {\rho g}}} \right)^{1/3}}$$

$$r = {2 \over 3}{\sigma \over {\rho g}}$$

$${{2\sigma } \over r}$$ > atmospheric pressure

$$r > {\left( {{2 \over 3}{{R\sigma } \over {\rho g}}} \right)^{2/3}}$$

WB JEE Subjects

Browse all chapters by subject