Home
Class 12
PHYSICS
Statement-1: The size of a hydrogen incr...

Statement-1: The size of a hydrogen increases as it rises in air.
Statement-2: The material of the balloon can be easily stretched.

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 Assertion.

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:
B
Promotional Banner

Topper's Solved these Questions

  • TEST PAPERS

    ALLEN |Exercise Part-1 Physics|15 Videos
  • TEST PAPERS

    ALLEN |Exercise part-2 physics|73 Videos
  • TEST PAPERS

    ALLEN |Exercise PAPER 2|60 Videos
  • TEST PAPER 4

    ALLEN |Exercise PHYSICS|45 Videos
  • UNIT & DIMENSIONS, BASIC MATHS AND VECTOR

    ALLEN |Exercise Exercise (J-A)|7 Videos

Similar Questions

Explore conceptually related problems

Assertion : The dimension of balloon filled with hydrogen increases as it raises a above. Reason : Balloon is expanded easily.

Statement-1: The angle of contact of a liquid decrease with increase in temeperature Statement-2: With increase in temperature the surface tension of liquid increase.

Statement-1: The stretching of a coil is determined by its shear modulus. Statement-2: Shear modulus change only shape of a body keeping its dimensions unchanged.

Statement-1 : The fundamental frequency of an organ pipe increases as the temperature increases Statement-2 : As the temperature increases, the velocity of sound increases more rapidly than length of the pipe.

Statement-1 : Sound travels faster in moist air Statement-2 : The density of moist air is less then density of dry air.

Statement-1 : The freezing of water is an endothermic process. Statement-2 : Heat must be removed from the water to make it freeze.

Statement-1 : Pendulum clocks go slow in summer and fast in winter. Statement-2 : The length of the pendulum used in clock increases in summer.

Statement-1: Machine parts are jammed in winter. Statement-2: The viscosity of lubricant used in machine part decrease at low temperature.

Statement-1: The bridges are declared unsafe after a long use. Statement-2: Elastic strength of bridges losses with time.

Statement-1: Elasticity restoring forces may be conservative. Statement-2: The value of strain for same stress are different while increasing the load and while decreasing the load.

ALLEN -TEST PAPERS-PAPER 3
  1. Assertion:- Any arbitrary displacement of charges inside a shell does ...

    Text Solution

    |

  2. Assertion:- Kirchhoff's voltage law indicates that field is conservati...

    Text Solution

    |

  3. Assertion:- Magnetism and superconductivity are natural enemies. Rea...

    Text Solution

    |

  4. Asseration: A metal piece and a non-metal (stone) piece are dropped fr...

    Text Solution

    |

  5. Assertion:- If earth did not have atomosphere, its average surface tem...

    Text Solution

    |

  6. Assertion:- Different colours of light have same velocity in vaccum, b...

    Text Solution

    |

  7. Assertion:- If an object placed on the optic axis of a lens is illumin...

    Text Solution

    |

  8. Assertion:- A simple microscope may have different magnification for d...

    Text Solution

    |

  9. Assertion : Newton's rings are formed in the reflected system. When th...

    Text Solution

    |

  10. Assertion:- A photocell is called an electric eye. Reason:- The elec...

    Text Solution

    |

  11. Assertion : Soft and hard X-rays differ in frequency as well as veloci...

    Text Solution

    |

  12. Assertion:In beta-decay, all the emitted electron do not have the same...

    Text Solution

    |

  13. Statement-I : To be used as amplifier, the transistor in the common em...

    Text Solution

    |

  14. Assertion:- Optical communication system is more economical than other...

    Text Solution

    |

  15. Assertion:- Two identical trains move in opposte sense in equatorial p...

    Text Solution

    |

  16. Statement-1: The size of a hydrogen increases as it rises in air. St...

    Text Solution

    |

  17. Assertion:- For Reynolds number R(e)gt2000m, the flow of fluid is turb...

    Text Solution

    |

  18. Assertion:- To drink chilled juicc, we use icc cubes of 0^(@)C. Reas...

    Text Solution

    |

  19. Assertion:- During adiabatic expansion of an ideal gas, temperature fa...

    Text Solution

    |

  20. Assertion:- Transvers waves are produced in a very long string fixed a...

    Text Solution

    |