Home
Class 12
PHYSICS
The half-life of a radioactive substance...

The half-life of a radioactive substance is `30` minutes, The time (in minutes) taken between `40 %` decay and `85 %` decay of the same radioactive substance is.

A

`15`

B

`30`

C

`45`

D

`60`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NEET 2024

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise QUESTION|50 Videos

  • OPTICS AND OPTICAL INSTRUMENTS

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise All Questions|87 Videos

Similar Questions

Explore conceptually related problems

The half-life of a radioactive substance is 20 min. the time taken between 50% decay and 87.5% decay of the substane will be

Half life of a radio-active substance is 20 minutes. The time between 20 % and 80 % decay will be

The half-life of a radioactive element is 100 minutes . The time interval between the stage to 50% and 87.5% decay will be:

The half life of a substance is 20 minutes. what is the time interval between 10% decay and 55% decay (approx).

" The half life of a substance is "20" minutes.What is the time interval between "33%" decay and "67" % decay? "

99% quantity of a radioactive substance decays between

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-NUCLEAR PHYSICS-Exercise
  1. When an alpha-particle of mass 'm' moving with velocity 'v' bombards o...

    Text Solution

    |

  2. The half-life of a radioactive substance is 30 minutes, The time (in m...

    Text Solution

    |

  3. If radius of the .(13)^(27)Al nucleus is taken to be R(AI), then the r...

    Text Solution

    |

  4. A nucleus of uranium decays at rest into nuclei of thorium and helium....

    Text Solution

    |

  5. The binding energy per nucleon of ""(3)^(7) Li and ""(2)^(4)He nuclei ...

    Text Solution

    |

  6. A radio isotope X with a half life 1.4xx10^(9) yr decays of Y which is...

    Text Solution

    |

  7. The half-life of a radioactive isotope X is 20 yr. It decays to anothe...

    Text Solution

    |

  8. A certain mass of hydrogen is changed to helium by the process of fusi...

    Text Solution

    |

  9. A mixture consists of two radioactive materials A1 and A2 with half-li...

    Text Solution

    |

  10. A radioactive nucleus of mass M emits a photon of frequency v and the ...

    Text Solution

    |

  11. The half-life of a radioactive isotope X is 50 yr. It decays to nother...

    Text Solution

    |

  12. Fusion reaction takes place at high temperature because

    Text Solution

    |

  13. A nucleus ""n^ m X emits one alpha-particle and two beta-particles. Th...

    Text Solution

    |

  14. The mass of a ""(3)^(7) Li nucleus is 0.042 u less than the sum of the...

    Text Solution

    |

  15. The activity of a radioactive sample is measures as N0 counts per minu...

    Text Solution

    |

  16. The number of beta particles emitter by radioactive sustance is twice ...

    Text Solution

    |

  17. In the nuclear decay given below ""Z^A X rarr ""(Z-1)^A Y rarr ""(Z-...

    Text Solution

    |

  18. Two radioactive materials X(1) and X(2) have decay constants 5 lambda ...

    Text Solution

    |

  19. Two radioactive substance A and B have decay constants 5 lambda and la...

    Text Solution

    |

  20. If radius of the ""(13)^(27)Al nucleus is estimated to be 3.6 Fermi, t...

    Text Solution

    |