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

  • NUCLEI

    NARAYNA|Exercise EXERCISE-4|44 Videos

  • NUCLEI

    NARAYNA|Exercise ASSERTION & REASON|5 Videos

  • NUCLEI

    NARAYNA|Exercise EXERCISE-2 (H.W)|9 Videos

  • NUCLEAR PHYSICS

    NARAYNA|Exercise LEVEL-II-(H.W)|9 Videos

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE- 4 One or more than one correct answer type|13 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

NARAYNA-NUCLEI -EXERCISE-3
  1. In the nuclear decay given below .Z^A X rarr .(Z-1).^A Y rarr .(Z-1)...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  5. An alpha nucleus of energy (1)/(2)m nu^(2) bombards a heavy nucleus o...

    Text Solution

    |

  6. The half-life of a radioactive isotope X is 50 years. It decays to ano...

    Text Solution

    |

  7. The power obtained in a reactor using U^(235) disintergration is 1000k...

    Text Solution

    |

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

    Text Solution

    |

  9. A nucleus .n^ m X emits one alpha-particle and two beta-particles. The...

    Text Solution

    |

  10. Fusion reaction takes place at high temperature because

    Text Solution

    |

  11. If the nuclear radius of .^27 A1 is 3.6 Fermi, the approximate nuclear...

    Text Solution

    |

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

    Text Solution

    |

  13. A certain mass of hydrogen is changes to helium by the process of fusi...

    Text Solution

    |

  14. The half-life of a radioactive isotope X is 20 years. It decays to ano...

    Text Solution

    |

  15. A radio isotope X with a half-life 1.4 xx 10^9 years decays of Y which...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  19. When an alpha-particle of mass 'm' moving with velocity 'v' bombards o...

    Text Solution

    |

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

    Text Solution

    |