Home
Class 12
PHYSICS
A liquid film at the surface behaves as ...

A liquid film at the surface behaves as a

A

stretched membrane

B

unstretched membrane

C

expanding surface

D

unoccupied space.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • SURFACE TENSION

    TARGET PUBLICATION|Exercise CRITICAL THINKING|62 Videos

  • SURFACE TENSION

    TARGET PUBLICATION|Exercise COMPETITIVE THINKING|72 Videos

  • STATIONARY WAVES

    TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos

  • WAVE MOTION

    TARGET PUBLICATION|Exercise MCQ 7.1|61 Videos

Similar Questions

Explore conceptually related problems

A thin wire ring of radius of 2m is placed on the surface a liquid. If a force of 4N is required to pull this ring from the surface of liquid (before the liquid film breaks) then the surface tension of liquid is

If the surface tension of a liquid is 5 N/m then the surface energy of the liquid film on a ring of area 0.15 m^(2) is

F_c and F_A denote cohesive and adhesive forces on a liquid molecule near the surface of a solid. The surface of liquid is convex , if

Why does a liquid surface behave like a stretched membrane ?

Surface tension is the property of a liquid by virtue of which free surface of liquid at rest tries to have minimum surface area. In doing so, the free surface of liquid at rest behaves as if it is covered with a stretched membrane. Surface tension (S) of a liquid is measured by from (F) acting on unit length fo a line (l) imagined to be drawn tangentially anywhere on the free surface i.e., S = (F)/(l). S is measured in N m^(-1) Read the above passage and answer the following question : (i)What is the cause of surface tension ? (ii) A wire ring of 30 mm diameter resting flat on the surface of a liquid is raised. The pull required is 1.5 gf more before the film breaks then it is after. What is surface tension of the liquid ? (iii) What are the implication of this phenomenon in day to day life ?

A thin film of a liquid is maintained between two very long, thin, parallel, horizontal wires separated by a distance 2a. A long wire of mass per unit length lamda is gently placed over the liquid film at the middle parallel to the wires. As a result the liquid surface is depressed by a vertical distance y(yltlta) at equilibrium. The surface tension of the liquid is (lamdaga)/(ky) then k is

...........is the property by virtue of which the free surface of the liquid at rest behaves like a stretched elastic membrane tending to contract to occupy minimum surface area.

If the surface tension of a liquid is T , the gain in surface energy for an increase in liquid surface by A is

TARGET PUBLICATION-SURFACE TENSION -EVALUATION TEST
  1. A liquid film at the surface behaves as a

    Text Solution

    |

  2. A drop of Volume V is pressed between the two glass plates so as to sp...

    Text Solution

    |

  3. Assertion : When two soap bubbles having different radii are kept in c...

    Text Solution

    |

  4. A capillary tube with very thin walls is attached to the beam of a bal...

    Text Solution

    |

  5. One end of a glass capillary tube with a radius r is immersed into wat...

    Text Solution

    |

  6. A capillary tube of radius r is lowered into water whose surface tensi...

    Text Solution

    |

  7. A soap bubble of radius 'r' is blown up to form a bubble of radius 2r ...

    Text Solution

    |

  8. Assertion : Pressure in bubble ( r ) in the atmosphere of pressure...

    Text Solution

    |

  9. Assertion:- Rise of water level in capillary tube should be accounted ...

    Text Solution

    |

  10. In gravity free space. The liquid in a capillary tube will rise to

    Text Solution

    |

  11. Assertion : When there is a thin layer of water between two glass pla...

    Text Solution

    |

  12. A glass capillary tube of radius r is placed vertically touching the s...

    Text Solution

    |

  13. A capillary is dipped in water vessel kept on a freely falling lift, t...

    Text Solution

    |

  14. Two spherical soap bubbles of radii r1 and r2 in vacuume coalesce unde...

    Text Solution

    |

  15. Water rises to height of 5 cm in glass capillary tube . If the area of...

    Text Solution

    |

  16. Suppose that 64 raindrops combine into a single drop . Calculate the r...

    Text Solution

    |

  17. Two separate air bubbles (radii 0.002 cm and 0.004) formed of the same...

    Text Solution

    |

  18. Two soap bubbles A and B are kept in a closed chamber where the air is...

    Text Solution

    |

  19. Two parallel glass plates are held vertically at a small separation d ...

    Text Solution

    |

  20. A glass rod of diameter d1 =1.5 mm is inserted symmetrically into a ...

    Text Solution

    |

  21. When a loop of wire is dipped in a wetting liquid and is taken out. A ...

    Text Solution

    |