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

The half-life of a radioactive substance is 30 min. 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

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-D)|10 Videos

  • NUCLEI

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-B)|27 Videos

  • MOVING CHARGES AND MAGNETISM

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section J (Aakash Challengers Questions)|5 Videos

  • OSCILLATIONS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section D) (ASSERTION-REASON TYPE QUESTIONS)|13 Videos

Similar Questions

Explore conceptually related problems

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.

Define half-life of a radioactive substance.

The half life of a radioactive substance is 13 years. The decay constant is

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

The half life of a substance is 20 minutes. E The time interval between 33% decay and 67% decay.

The half - life of a radioactive substance is 50 days. The substance will disintegrate completely in

The half-life period of a radioactive substance is 5 min . The amount of substance decayed in 20 min will be

The half life of radioactive element is 20 min . The time interval between the stages of its 33% and 67% decay is

A radioactive substance takes 20 min to decay 25%. How much time will be taken to decay 75% :

The half life of a radioactive substance is 20s, the time taken for the sample to decay by 7//8^(th) of its initial value is

AAKASH INSTITUTE ENGLISH-NUCLEI-ASSIGNMENT (SECTION-C)
  1. Radioactive material A has decay constant 8lambda and material B has ...

    Text Solution

    |

  2. The half-life of a radioactive substance is 30 min. The time (in minut...

    Text Solution

    |

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

    Text Solution

    |

  4. If radius of the ""(13)^(27) Al nucleus is taken to be R(Al)'then the ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  9. If the nuclear radius of .13Al^27 is 3.6 Fermi, the approximate nucle...

    Text Solution

    |

  10. A mixture consists of two radioactiv materials A(1) and A(2) with half...

    Text Solution

    |

  11. The half life of a radioactive nucleus is 50 days. The time interval (...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  14. Fusion reaction takes place at high tamperature because

    Text Solution

    |

  15. A nucleus .(n)^(m)X emits one alpha-particle and two beta^(-) particle...

    Text Solution

    |

  16. Two radioacitve nuclei P and Q, in a given sample decay into a stable ...

    Text Solution

    |

  17. The mass of .3^7Li is 0.042 amu less than the sum of masses of its con...

    Text Solution

    |

  18. The activity of a radioavtive sample is measured as N(0) counts per mi...

    Text Solution

    |

  19. The decay constant of a radioactive isotope is lambda. If A1 and A2 ar...

    Text Solution

    |

  20. The binding energy per nucleon of deuterium and helium nuclei are 1.1 ...

    Text Solution

    |