Home
Class 11
PHYSICS
A thread is tied slightly loose to a wir...


A thread is tied slightly loose to a wire frame as in figure and the frame is dipped into a soap solution and taken out . The frame is comletely covered with the film. When the portion `A` puntured with a pin The thread.

A

Becomes concave towards `A`

B

Becomes convex towards `A`

C

Remains in the initial position

D

Either (a) or (b) depensing on the size of `A` w.r.t. `B`

Text Solution

Verified by Experts

The correct Answer is:
A
Because film tries to cover minimum surface area.
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF MATTER

    A2Z|Exercise Pressure Difference And Capillarity|23 Videos

  • PROPERTIES OF MATTER

    A2Z|Exercise Viscosity|29 Videos

  • PROPERTIES OF MATTER

    A2Z|Exercise Elasticity And Work Done In Stretching A Wire|25 Videos

  • OSCILLATION AND SIMPLE HARMONIC MOTION

    A2Z|Exercise Chapter Test|29 Videos

  • ROTATIONAL DYNAMICS

    A2Z|Exercise Chapter Test|29 Videos

Similar Questions

Explore conceptually related problems

A square frame of length L is immersed in soap solution and taken out. The force experienced by the square plate is

A rectangular wire frame of size 2 cm xx 2 cm, is dipped in a soap solution and taken out. A soap film is formed, it the size of the film is changed to 3 cm x 3 cm, Calculate the work done in the process. The surface tension of soap film is 3 xx 10^(-2) N/m.

A squre wire frame of side L is dipped in a liquid. On taking out , a membrane is formed if the surface tension of liquid is T, the force acting on the frame due to the membrane will be

A square wire frame of L is dipped in a liquid, on taking out a membrane is formed. If the surface tension of liquid is T, force acting on the frame will be

A wire forming a loop is dipped into soap solution and taken out so that a film of soap solution is formed. A loop of 6.28 cm long thread is gently put on the film and the film is pricked with a needle inside the loop. The thread loop takes the shape of a circle. Find the tension in the thread. Surface tension of soap solution =0.030Nm^-1 .

A light wire AB of length 10 cm can slide on a vertical frame as shown in figure. There is a film of soap solution trapped between the frame and the wire. Find the load W that should be suspended from the wire to keep it in equilibrium. Neglect friction. Surface tension of soat solution =25 dyne cm^-1. Take g=10 ms^-2

A square wire frame of size L is dipped in a liquid . On taking out , a membrane is formed . If the surface tension of liquid is T, then force acting per unit length of the frame is

A wire is bent in the form of a U -shape and a slider of negligible mass is connecting the two vertical sides of the U-shape. This arrangement is dipped in a soap solution and lifted a thin soap film is formed in t he frame it supports a wegith of 2.0xx10^(-2) if the length of the slider is 40 cm whta is the surface tension of the film?

A2Z-PROPERTIES OF MATTER-Surface Tension And Surface Energy
  1. Soap helps in cleaning clothes, because

    Text Solution

    |

  2. The spider and insect move and run about on the surface of water witho...

    Text Solution

    |

  3. A thread is tied slightly loose to a wire frame as in figure and the f...

    Text Solution

    |

  4. The maximum force, in addition to the weight required to pull a wire o...

    Text Solution

    |

  5. Consider a liquid contained in a vessel. The liquid solid adhesive for...

    Text Solution

    |

  6. A thin metal disc of radius r floats on water surface and bends the su...

    Text Solution

    |

  7. A thin liquid film formed between a U-shaped wire and a light slider s...

    Text Solution

    |

  8. Energy needed in breaking a drop of radius R into n drops of radii r i...

    Text Solution

    |

  9. The radius of a soap bubble is increased from (1)/(sqrtpi) cm to (2)/(...

    Text Solution

    |

  10. One thousand small water drops of equal radii combine to form a big dr...

    Text Solution

    |

  11. A film of water is formed between two straight parallel wires of lengt...

    Text Solution

    |

  12. There is a howizontal film of soap solution. On it a thread is placed ...

    Text Solution

    |

  13. If a number of little droplets of water, each of radius r, coalesce to...

    Text Solution

    |

  14. The figure shows a soap film in which a closed elastic thread is lying...

    Text Solution

    |

  15. A long capillary tube of mass pi gm, radisu 2mm and negligible thickne...

    Text Solution

    |

  16. The surface tension of water is 75(dyne)/(cm). Find the minimum vertic...

    Text Solution

    |

  17. A paper disc of radius R from which a hole of radius r is cut out is f...

    Text Solution

    |

  18. A wire of mass 1g is kept horizontally on the surface of water. The le...

    Text Solution

    |

  19. A liquid is containe in a vertical tube of semicircular cross section ...

    Text Solution

    |

  20. A wire ring of diameter 14cm is gently lowered on to a liquid surface ...

    Text Solution

    |