A soap bubble assumes a spherical surface. Which of the following… - Vidyadip

MCQ

A soap bubble assumes a spherical surface. Which of the following statement is wrong

A
The soap film consists of two surface layers of molecules back to back
B
The bubble encloses air inside it
✓
The pressure of air inside the bubble is less than the atmospheric pressure; that is why the atmospheric pressure has compressed it equally from all sides to give it a spherical shape
D
Because of the elastic property of the film, it will tend to shrink to as small a surface area as possible for the volume it has enclosed

✓

Answer

Correct option: C.

The pressure of air inside the bubble is less than the atmospheric pressure; that is why the atmospheric pressure has compressed it equally from all sides to give it a spherical shape

c
(c)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A plano-convex lens of focal length $30\,cm$ has its plane surface silvered. An object is placed $40\,cm$ from the lens on the convex side. The distance of the image from the lens is.......$cm$

In the circuit shown, the key $(k)$ is closed at $t = 0$ , the current through the key at the instant $t = 10\,-\,3ln\,2\, sec$ . is.......$Amp$

An electric dipole is put in north-south direction in a sphere filled with water. Which statement is correct

Two large, identical water tanks, $1$ and $2$ , kept on the top of a building of height $H$, are filled with water up to height $h$ in each tank. Both the tanks contain an identical hole of small radius on their sides, close to their bottom. A pipe of the same internal radius as that of the hole is connected to tank $2$ , and the pipe ends at the ground level. When the water flows the tanks $1$ and $2$ through the holes, the times taken to empty the tanks are $t_1$ and $t_2$, respectively. If $H=\left(\frac{16}{9}\right) h$, then the ratio $t_1 / t_2$ is. . . . .

A conducting square frame of side $'a'$ and a long straight wire carrying current $I$ are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity $'V'.$ The $emf$ induced in the frame will be proportional to

Statement $-1$ : When ultraviolet light is incident on a photocell, its stopping potential is $V_0$ and the maximum kinetic energy of the photoelectrons is $K_{max}$ .When the ultraviolet light is replaced by $X-$rays, both $V_0$ and $K_{max}$ increase.
Statement $-2$ : Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light

A light cylindrical vessel is kept on a horizontal surface. Area of base is A. A hole of crosssectional area $'a'$ is made just at its bottom side. The minimum coefficient of friction necessary to prevent sliding the vessel due to the impact force of the emerging liquid is $(a\,<\,<\,A)$

Diameter of a plano-convex lens is $6 \,cm$ and thickness at the centre is $3\, mm$. If the speed of light in the material of the lens is $2 \times 10^8 m/sec$, the focal length of the lens is.......$cm$

The count rate of $10\,g$ of radioactive material was measured at different times and this has been shown in the figure. The half life of material and the total counts (approximately) in the first half life period, respectively are

The wall with a cavity consists of two layers of brick separated by a layer of air.All three layers have the same thickness and the thermal conductivity of the brick is much greater than that of air. The left layer is at a higher temperature than the right layer and steady state condition exists. Which of the following graphs predicts correctly the variation of temperature $T$ with distance $d$ inside the cavity?