Home
Class 12
PHYSICS
During mean life of a radioactive elemen...

During mean life of a radioactive element, the fraction that disintegrates is

A

e

B

`(e-1)/e`

C

`1/e`

D

`e/(e-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NUCLEI

    AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION-C)|81 Videos

  • NUCLEI

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

  • NUCLEI

    AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION-A)|39 Videos

  • MOVING CHARGES AND MAGNETISM

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

  • OSCILLATIONS

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

Similar Questions

Explore conceptually related problems

In a mean life of a radioactive sample

Half-life of radioactive element depend upon

What is the total life of a radioactive element ?

True or False Statements : In a radioactive element the fraction of initial amount remaining after its mean life time is l/e.

Half life of radioactive element is 100 yrs. The time in which it disintegrate 50% of its mass will be

Half-life period for radioactive element is

Fill in the blanks with appropriate items : The half-life period of radioactive element _______ minute if 75% of it disintegrates in 40 min.

AAKASH INSTITUTE-NUCLEI-ASSIGNMENT (SECTION-B)
  1. N atoms of a radioactive element emit n alpha particles per second. Th...

    Text Solution

    |

  2. 90% of the active nuclei present in a radioactive sample are found to ...

    Text Solution

    |

  3. A sample of radioactive element has a mass of 10 g at an instant t=0. ...

    Text Solution

    |

  4. During mean life of a radioactive element, the fraction that disintegr...

    Text Solution

    |

  5. An element A decays into element C by a two-step process : A rarr B ...

    Text Solution

    |

  6. After three half lives, the percentage of fraction of amount a).35 b)1...

    Text Solution

    |

  7. The radioactivity of a certain radioactive element drops to 1//64 of i...

    Text Solution

    |

  8. The half-life of a radioactive substance against alpha-decay is 1.2 xx...

    Text Solution

    |

  9. The value of binding energy per nucleon is

    Text Solution

    |

  10. In the nuclear fusion reaction (1)^(2)H + (1)^(3)H rarr (2)^(4)He + ...

    Text Solution

    |

  11. A nucleus ""^(220)X at rest decays emitting an alpha-particle . If ene...

    Text Solution

    |

  12. Radioactive nuclei P and Q disintegrate into R with half lives 1 month...

    Text Solution

    |

  13. A radioactive element X emits six alpha-particles and four beta-partic...

    Text Solution

    |

  14. In nature, ratio of isotopes Boron, ""5B^(10) and ""5B^(11) , is (give...

    Text Solution

    |

  15. Q -value of the decay ""(11)^(22)Na to ""(10)^(22)Ne+e^(+)+nu is

    Text Solution

    |

  16. Which of the alternatives gives correct match of columni with column-I...

    Text Solution

    |

  17. Correct increasing order of penetrating powers of alpha,beta particles...

    Text Solution

    |

  18. In proton-proton cycle, four hydrogen atoms combine to release energy

    Text Solution

    |

  19. 37 Rutherford equals

    Text Solution

    |

  20. Which of these is incorrect about nuclear forces ?

    Text Solution

    |