Q114 / 200 · NEET 2023 (All India) · Physics

The amount of energy required to form a soap bubble of radius $2 cm$ from a soap solution is nearly: (surface tension of soap solution = $0.03 N m^{- 1}$ )

A
$50.1 \times 10^{- 4} J$
B
$30.16 \times 10^{- 4} J$
C
$5.06 \times 10^{- 4} J$
Correct answer
D
$3.01 \times 10^{- 4} J$

Solution

Soap bubble has two free surface.
Therefore, amount of energy required $= 2 [S \times A] = 2 [0.03 \times (4 π {(2 \times 10^{- 2})}^{2})] = 3.01 \times 10^{- 4} J$

Hence, the correct answer is option: 'D'.

Relevant Questions

Consider a water tank shown in the figure. It has one wall at and can be taken to be very wide in the direction. When filled with a liquid o2025Surface tension
A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface tension of water is , then the excess forc2024Surface tension
A capillary tube of radius r is immersed in water and water rises in it to a height h . The mass of the water in the capillary is 5 g . Anot2020 (Phase 1)Surface tension
A liquid does not wet the solid surface if angle of contact is:2020 (Phase 2)Surface tension
A rectangular film of liquid is extended from ( 4 cm × 2 cm ) to ( 5 cm × 4 cm ) . If the work done is 3 × 10 - 4 J , the value of the surfa2016 (Phase 2)Surface tension
Three liquids of densities, 1 , 2 and 3 (with, 1 2 3 ) , having the same value of surface tension, T , rise to the same height in three iden2016 (Phase 2)Surface tension

The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly: (surface tension of soap solution = 0.03 N m-1)

Solution

Relevant Questions

The amount of energy required to form a soap bubble of radius $2 cm$ from a soap solution is nearly: (surface tension of soap solution = $0.03 N m^{- 1}$ )