Home
Class 11
PHYSICS
Assertion : There are two propellers in ...

Assertion : There are two propellers in a helicopter.
Reason : Angular momentum is conserved.

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 a correct explanation of the Assertion.

C

If Assertion is true but the Reason is false.

D

If both, Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Both, the assertion and reason are true, but the reason is not a correct explanation of the assertion. Infact, if helicopter has only one propeller, the helicopter itself will turn in opposite direction to conserve the angular momentum.
Promotional Banner

Topper's Solved these Questions

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    PRADEEP|Exercise Integer Type Questions|13 Videos

  • RAY OPTICS

    PRADEEP|Exercise Problem For Practice(a)|25 Videos

  • THERMODYNAMICS

    PRADEEP|Exercise Assertion- Reason Type Questions|19 Videos

Similar Questions

Explore conceptually related problems

Why there two propellers in a helicopter ?

Angular Momentum Conservation

Angular Momentum Conservation

Angular Momentum Conservation

Angular Momentum Conservation

Conservation Of Angular Momentum

Conservation Of Angular Momentum

Assertion: There is not loss in energy in elastic collision. Reason: Linear momentum is conserved in elastic collision.

Assertion: A satellite is orbiting around a planet then its angular momentum is conserved Reason: Linear momentum conservation leads to angular momentum conservation.

PRADEEP-SYSTEMS OF PARTICLES AND ROTATIONAL MOTION-Assertion- Reason Type questions
  1. Assertion : In rolling, all points of a rigid body have the same linea...

    Text Solution

    |

  2. Assertion : The speed of a whirl wind in a tornado is alarmigly high. ...

    Text Solution

    |

  3. Assertion : The velovity of a body at the bottom of an inclined plane ...

    Text Solution

    |

  4. Assertion : The moment of inertia of a rigid body reduces to its minim...

    Text Solution

    |

  5. Assertion : The centre of mass of an electron and proton, when release...

    Text Solution

    |

  6. Assertion : At the centre of earth, a body has centre of mass , but no...

    Text Solution

    |

  7. Assertion : Torque is due to transverse componet is not perpendicular ...

    Text Solution

    |

  8. Assertion : power associated with torque is product of torque and angu...

    Text Solution

    |

  9. Assertion : Torque is time rate of change of a parameter, called angua...

    Text Solution

    |

  10. Assertion : If earth were to shrink length of the day would increase. ...

    Text Solution

    |

  11. Assertion : There are two propellers in a helicopter. Reason : Angul...

    Text Solution

    |

  12. Assertion : If there is no external torque on a body about its centre ...

    Text Solution

    |

  13. Statement -1 : In the formation of a neutron star, spin angular veloci...

    Text Solution

    |

  14. Statement-1 : A wheel moving down a perfectly frictionless inclined pl...

    Text Solution

    |

  15. Statement-1 : Torque is a vector whose direction is along the applied ...

    Text Solution

    |

  16. Statement-1 : The centre of mass of a body may lie where there is no m...

    Text Solution

    |

  17. Statement-1 : Moment of inertia of a body is same, whatever be the axi...

    Text Solution

    |

  18. Statement-1 : When ice on polar caps of earth melts, duration of the d...

    Text Solution

    |

  19. Statement-1 : A hollow cylinder of diameter 0.5 m has a mass of 10 kg....

    Text Solution

    |

  20. Statement-1 : To unscrew a rusted nut, we need a wrench with longer ar...

    Text Solution

    |