Home
Class 11
PHYSICS
Assertion : Railways tracks are laid o...

Assertion : Railways tracks are laid on small sized wooden sleepers.
Reason : Small sized wooden sleepers are used so that rails exert more pressure on the railway track. Due to which rail does not leave the track

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
D

Railways tracks are laid on large sized wooden sleepers. Due to large sized sleepers the weight of rail act on the large area. Hence, the pressure is reduced appreciably.
Promotional Banner

Topper's Solved these Questions

  • FLUID MECHANICS

    ERRORLESS|Exercise PAST YEARS QUESTIONS|14 Videos
  • ELASTICITY

    ERRORLESS|Exercise ASSERTION & REASON |10 Videos
  • FRICTION

    ERRORLESS|Exercise ASSERTION & REASON |8 Videos

Similar Questions

Explore conceptually related problems

Railway tracks are laid on large sized wooden, iron or cement sleepers. Why?

Assertion : paper pins are made to have pointed end. Reason : Because pointed pins have very small area due to which even for small applied force it exert large pressure on the surface.

Why a small gap is left between the iron rails of railway tracks ?

Give reasons for the following statements: (a) Railway tracks are laid on large sized wooden sleepers. (b) It is difficult to walk on and. (c) Walking bare footed on a pebbled path is painful.

(a) Whi are wide wooden sleepers kept below railway lines? (b) Whi does a balloon not collapse under atmospheric pressure?

Advanced countries are making use of powerful electromagnets to move trains at very high speed. These trains are called maglev trains (abbreviated from magnetic levitation).These trains float on a guideway and do not run on steel rail tracks. Instead of using a engine based on fossil fuels, they make use of magnetic field forces. The magnetized coils are arranged in the guide way which repels the strong magnets placed in the train's under carriage. This helps train move over the guideway, a technic called electro - dynamic suspension. When current passes in the coils of guideway , a typical magnetic field is set up between the undercarriage of train and guideway which pushes and pull the train along the guideway depending on the requirement. The lack of friction and its aerodynamic style allows the train to more at very high speed. (i) The levitation of the train is due to

Advanced countries are making use of powerful electromagnets to move trains at very high speed. These trains are called maglev trains (abbreviated from magnetic levitation).These trains float on a guideway and do not run on steel rail tracks. Instead of using a engine based on fossil fuels, they make use of magnetic field forces. The magnetized coils are arranged in the guide way which repels the strong magnets placed in the train's under carriage. This helps train move over the guideway, a technic called electro - dynamic suspension. When current passes in the coils of guideway , a typical magnetic field is set up between the undercarriage of train and guideway which pushes and pull the train along the guideway depending on the requirement. The lack of friction and its aerodynamic style allows the train to more at very high speed. (3) The force which makes maglev move

Advanced countries are making use of powerful electromagnets to move trains at very high speed. These trains are called maglev trains (abbreviated from magnetic levitation).These trains float on a guideway and do not run on steel rail tracks. Instead of using a engine based on fossil fuels, they make use of magnetic field forces. The magnetized coils are arranged in the guide way which repels the strong magnets placed in the train's under carriage. This helps train move over the guideway, a technic called electro - dynamic suspension. When current passes in the coils of guideway , a typical magnetic field is set up between the undercarriage of train and guideway which pushes and pull the train along the guideway depending on the requirement. The lack of friction and its aerodynamic style allows the train to more at very high speed. (2) The disadvantage of maglev trains is that

ERRORLESS-FLUID MECHANICS-ASSERTION AND REASON
  1. Assertion : To empty an oil tank, two holes are made. Reason : Oi...

    Text Solution

    |

  2. Assertion : A man sitting in a boat which is floating on a pond. If ...

    Text Solution

    |

  3. Assertion : A piece of ice floats in water, the level of water remai...

    Text Solution

    |

  4. Assertion: The velocity increases, when water flowing in broader pipe ...

    Text Solution

    |

  5. Assertion. A bubble comes from the bottom of a lake to the top. Reas...

    Text Solution

    |

  6. Assertion: The velocity of flow of a liquid is smaller when pressure i...

    Text Solution

    |

  7. Assertion: The shape of an automobile is so designed that its front re...

    Text Solution

    |

  8. Assertion : The size of the needle of a syringe controls flow rate b...

    Text Solution

    |

  9. Assertion: A fluid flowing out of a small hole in a vessel apply a bac...

    Text Solution

    |

  10. Assertion : For a floating body to be in stable equilibrium, its cen...

    Text Solution

    |

  11. Assertion: In taking into account the fact that any object which float...

    Text Solution

    |

  12. Assertion : A thin staindess steel needle can by floating on a still w...

    Text Solution

    |

  13. Assertion : Aeroplanes are made to run on the runway before take off...

    Text Solution

    |

  14. Assertion: Sudden fall of pressure of at a place indicates storm. R...

    Text Solution

    |

  15. Assertion : Inside parts of machine are jammed in winter . Reason :...

    Text Solution

    |

  16. Assertion : When two boats sails parallel in the same direction and ...

    Text Solution

    |

  17. Statement I: A raindrop after failing through some height attains a co...

    Text Solution

    |

  18. Assertion : paper pins are made to have pointed end. Reason : Beca...

    Text Solution

    |

  19. Assertion : Railways tracks are laid on small sized wooden sleepers....

    Text Solution

    |

  20. Assertion : Terminal velocity is same as the critical velocity. Re...

    Text Solution

    |