Home
Class 12
PHYSICS
Assertion :- When a spring is elongated ...

Assertion `:-` When a spring is elongated work done by spring is negative but when it compressed work done by spring is positive.
Reason`:-` Work done by spring is path dependent

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertiion.

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are False

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

When is the work done by gravity negative ?

Work Done By Spring Forces

When work done by force of gravity is negative, then

When is work done by a force negative ?

Assertion: A spring has potential energy , both when it is compresed or stretched. Reason: In compressing or stretching, work is done on the spring against the resotoring force.

A spring is stretched by distance x and then compressed to same distance from its original length. The work done by the spring force is (k=spring constant)

The work done on the system in an aidabatic compression depends on

Assertion :- Work done is positive when force acts in the direction of displacement. Reason :- Work done by frictional force can not be positive.

These questions consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following five reponses (a) If both Assertion and Reason arecorrect and Reason is the correct explanation of Asserrtion. (b) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c ) If Assertion is true but Reason is false. (d) If Assertion is false but Reason is true. Assertion Total work done by spring may be positive ,negative or zero. Reason Direction of spring force is always towards mean position.

ALLEN-TEST PAPER-Exercise (Physics)
  1. Assertion :- According work energy theorem net work done on a body is ...

    Text Solution

    |

  2. Assertion :- Mass and energy are not conserved separately,but are cons...

    Text Solution

    |

  3. Assertion :- When a spring is elongated work done by spring is negativ...

    Text Solution

    |

  4. A particle is moving on a circular path such that at any instant its p...

    Text Solution

    |

  5. A car is moving along a circular track with tangential acceleration of...

    Text Solution

    |

  6. A point mass moves along a circle of radius R with a constant angular ...

    Text Solution

    |

  7. A car is moving on circular path of radius 100m such that its speed is...

    Text Solution

    |

  8. A bob of mass m is attached at one end of a string of length l other e...

    Text Solution

    |

  9. A ball of mass m inside a smooth spherical shell of radius R with velo...

    Text Solution

    |

  10. A bead is arranged to move with constant speed around a loop that lies...

    Text Solution

    |

  11. A particle is suspended from a string of length R. It is given a veloc...

    Text Solution

    |

  12. The angular displacement(theta) of the blades of a ceiling fan, when t...

    Text Solution

    |

  13. A wheel of radius R=0.1m is rolling without slipping on a horizontal s...

    Text Solution

    |

  14. Two identical rings each of mass m with their planes mutually perpendi...

    Text Solution

    |

  15. The moment of inertia of a uniform flat disc about its own axis is I. ...

    Text Solution

    |

  16. The diagram shows a uniform disc of mass M & radius 'a', if the moment...

    Text Solution

    |

  17. A tangential force F acts at the top of a thin spherical shell of mass...

    Text Solution

    |

  18. A uniform solid disc of mass 1 kg and radius 1m is kept on a rough hor...

    Text Solution

    |

  19. A rod of mass m and length l is hinged at one of its ends A as shown i...

    Text Solution

    |

  20. A massless rope is wrapped around a ring (with a groove along its circ...

    Text Solution

    |