Home
Class 12
PHYSICS
A soap bubble of radius 1//sqrtpi "cm" i...

A soap bubble of radius `1//sqrtpi "cm"` is expanded to radius `2//sqrtpi "cm".` Calculate the work done. Surface tension of soap solution `=30 "dyne"" "cm^(-1).`

A

30 dyne/cm

B

20 dyne/cm

C

15 dyne/cm

D

40 dyne/cm

Text Solution

Verified by Experts

The correct Answer is:
A
`W = 2 xx T [ 4piR_(2)^(2) - 4piR_(1)^(2)] `
` :. 720 = 2 T [ 4pi xx 4/pi - 4pi xx 1/pi] `
` :. 720 = 2T xx 12 :. T = 30 ` dyne/cm
Promotional Banner

Topper's Solved these Questions

  • SURFACE TENSION

    MARVEL PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS . (HIGHER LEVEL)|35 Videos

  • SURFACE TENSION

    MARVEL PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS . (GRAPHICAL MCQS)|3 Videos

  • SURFACE TENSION

    MARVEL PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS . (TEST YOUR GRASP )|10 Videos

  • STATIONARY WAVES

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP-8|20 Videos

  • WAVE MOTION

    MARVEL PUBLICATION|Exercise Test your grasp|15 Videos

Similar Questions

Explore conceptually related problems

A soap bubble is blown from a radius of 1 cm to 2 cm. Calculate the work done in doing so, if the surface tension of the soap solution is 42 dyne/cm.

A soap bubble is blown to a radius of 3 cm. if it is to be further blown to a radius of 4 cm what is the work done? (surface tension of soap solution =3.06xx10^(-2)Nm^(-1))

A soap bubble of radius R has formed at normal temperature and pressure under isothermal conditions. Complete the work done. The surface tension of soap solution is T .

A soap bubble has a radius of 6cm. The work done in increasing the radius from 6 cm to 10 on will be (in mJ). (Surface tension of soap solution is 0.04 Nm.)

If the excess pressure inside a spherical soap bubble of radius 1 cm is balanced by that due to column of oil of specific gravity 0.9, height 1.36 mm. Calculate the value of surface tension of soap solution.

Energy required to form a soap bubble of diameter 20 cm will be (Surface tension for soap solution is 30 dynes/cm )

If the excess pressure inside a soap bubble of radius 5 mm is equal to the pressure of a water column of hight 0.8 cm, then the surface tension of the soap solution will be

A soap bubble of radius 3cm is chaged with 9 nC (nanocoulomb) Find the excess pressure inside the bubble surface tension of soap solution =3xx10^(-3)m^(-1)

Calculate the work done in blowing a soap bubble from a radius of 2cm "to" 3cm. The surface tension of the soap solution is 30" ""dyne"" "cm^(-2).

MARVEL PUBLICATION-SURFACE TENSION -MULTIPLE CHOICE QUESTIONS . (STANDARD LEVEL)
  1. If T is the surface tension of soap solution, the amount of work done ...

    Text Solution

    |

  2. If T is the surface tension of soap solution, the amount of work done ...

    Text Solution

    |

  3. A soap bubble of radius 1//sqrtpi "cm" is expanded to radius 2//sqrtpi...

    Text Solution

    |

  4. The radii of two soap bubbles are r(i) and r(2). In isothermal conditi...

    Text Solution

    |

  5. Work done in forming a liquid drop of radius R is W(1) and that of rad...

    Text Solution

    |

  6. A sheet can be made water proof by coating it with a substance that ch...

    Text Solution

    |

  7. Work W is required to form a bubble of volume V from a given solution....

    Text Solution

    |

  8. A spherical drop of water has a diameter of 2 mm . If the surface tens...

    Text Solution

    |

  9. The excess pressure inside a soap bubble of volume V(1) is twice the e...

    Text Solution

    |

  10. Air is pushed in a soap bubble to increase its radius from R to 2R . I...

    Text Solution

    |

  11. At critical temperature, the surface tension of a liquid

    Text Solution

    |

  12. If the excess pressure inside a soap bubble of radius 5 mm is equal to...

    Text Solution

    |

  13. When a soap bubble is charged :-

    Text Solution

    |

  14. If the radius of a soap bubble is four times that of another, then the...

    Text Solution

    |

  15. The surface tension of pure water is measured at different temperature...

    Text Solution

    |

  16. When one end of a capillary tube is dipped vertically in water, the pr...

    Text Solution

    |

  17. A long cylinderical glass vessel has a small hole of radius r at its b...

    Text Solution

    |

  18. What is the energy required to blow a soap bubble of radius 5 cm ? [ S...

    Text Solution

    |

  19. The surface tension of soap solution is 0.030 N/m . What is the energy...

    Text Solution

    |

  20. Work done in increasing the size of a soap bubble from a radius of 3cm...

    Text Solution

    |