Home
Class 12
PHYSICS
Statement-1 : A planet moves in a ellipt...

Statement-1 : A planet moves in a elliptical orbit around the sun. Its angular momentum remains constant.
Statement-2 : Gravitational force is a central force. Therefore, no torque acts on the planet with respect to the sun. As a result angular momentum remains conserved.

A

Statement-1 is false, Statement-2 is true.

B

Statement-1 is true, Statement-2 is true , Statement-2 is a correct explanation for Statement-1.

C

Statement-1 is true, Statement-2 is true, Statement-2 is not a correct explanation for Statement-1.

D

Statement-1 is true, Statement-2 is false.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST-2

    MODERN PUBLICATION|Exercise MCQs|52 Videos
  • OSCILLATIONS

    MODERN PUBLICATION|Exercise RCQ|7 Videos

Similar Questions

Explore conceptually related problems

A planet is moving around the sun in an elliptical orbit. Its speed is

Answer the following : Comets move around the sun in highly elliptical orbits. The gravitational force on the comet due to the sun is not normal to the comet's velocity in general. Yet the work done by the gravitational force over every complete orbit of the comet is zero. Why?

A ball rests upon a flat piece of paper on a table to. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table the ball (1) remains stationary if there is no friction between the paper and the ball (2) moves to the left if ther is a friction between the paper and the ball. (3) moves forward, i.e. in the direction in which the paper is pulled. Here, the correct statement/s is/ are

If Bohr’s quantisation postulate (angular momentum = nh/2pi) is a basic law of nature, it should be equally valid for the case of planetary motion also. Why then do we never speak of quantisation of orbits of planets around the sun?

A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 m s^(-1) to 3.5 m s^(-1) in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force ?

MODERN PUBLICATION-MOCK TEST-3-MCQs
  1. A hollow metallic tube a length L and closed at one end produces reson...

    Text Solution

    |

  2. Equal temperature difference exists between the ends of two metallic r...

    Text Solution

    |

  3. Statement-1 : A planet moves in a elliptical orbit around the sun. Its...

    Text Solution

    |

  4. Statement-1 : When light enters a prism and deviates from its normal p...

    Text Solution

    |

  5. Plank's constant is represented by:

    Text Solution

    |

  6. A body moves with uniform acceleration. If v(1), v(2) and v(3) be the ...

    Text Solution

    |

  7. Two forces of magnitude F and sqrt(3) F act at right angles to each ot...

    Text Solution

    |

  8. The magnitude of the vector product of two vectors is 4. The magnitude...

    Text Solution

    |

  9. A Diwali rocket is ejecting 0.05 kg of gases per second at a velocity ...

    Text Solution

    |

  10. Which of the following is the relation of centripetal force?

    Text Solution

    |

  11. A metal ball hits a wall and does not rebound, where as  b a rubber ba...

    Text Solution

    |

  12. A body of mass m is raised through a distance equal to the radius of t...

    Text Solution

    |

  13. When load is applied to a wire the extension is 3 mm, the extension in...

    Text Solution

    |

  14. If the work done in blowing a bubble of radius R is W, then the work d...

    Text Solution

    |

  15. Under constant temperature, graph between P and 1//V is a :

    Text Solution

    |

  16. There are three source of sound of equal intensities with frequencies ...

    Text Solution

    |

  17. The density of a liquid of coefficient of cubical expansion gamma is d...

    Text Solution

    |

  18. There are two spherical balls A and B of the same material with same s...

    Text Solution

    |

  19. Between the plates of a parallel plate capacitor of capacitance C, tw...

    Text Solution

    |

  20. A parallel plate capacitor of capacity 100 muF is charged by a battery...

    Text Solution

    |