Home
Class 12
PHYSICS
A radioactive substance emits 100 beta p...

A radioactive substance emits 100 beta particles in the first 2 seconds and 50 beta particles in the next 2 seconds. The mean life of the sample is

A

4s

B

2s

C

`(2)/((ln 2))s`

D

2(ln 2)s

Text Solution

Verified by Experts

The correct Answer is:
C
`T_(1//2) = 2` sec
Mean life `(tau ) = (T_(1//2))/(ln 2)= (2)/(ln 2)` sec
Promotional Banner

Topper's Solved these Questions

  • ATOMIC AND NUCLEAR PHYSICS

    ERRORLESS|Exercise Past Years Questions|67 Videos

  • ATOMIC AND NUCLEAR PHYSICS

    ERRORLESS|Exercise Assertion and Reason|23 Videos

  • ATOMIC AND NUCLEAR PHYSICS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Nucleus, Nuclear Reaction)|57 Videos

  • ALTERNATING CURRENT

    ERRORLESS|Exercise Assertion & Reason|13 Videos

  • CURRENT ELECTRICITY

    ERRORLESS|Exercise ASSERTION AND REASON|26 Videos

Similar Questions

Explore conceptually related problems

Which emits beta -particles ?

A radioative sample emit n beta - particle is 2 sec , in next 5 eV sec it emit 0.75 n beta - particle , what is the mean life of the sample?

A radioactive sample decays by ' beta -emission. In first 2 seconds, n beta -particles are emitted and in next 2 seconds, 0.25 n beta -particles are emitted. The half life of radioactive NUCLEI (in second) is

A radioactive nucleus emits a beta particle. The parent and daughter nuclei are:

A particle starting from rest travels a distance x in first 2 seconds and a distance y in next two seconds, then

ERRORLESS-ATOMIC AND NUCLEAR PHYSICS-NCERT BASED QUESTIONS (Radioactivity)
  1. A freshly prepared radioactive sample of half-life 4 hours emits radia...

    Text Solution

    |

  2. The decay constant of a radioactive sample is lambda. The half-life an...

    Text Solution

    |

  3. A radioactive substance emits 100 beta particles in the first 2 second...

    Text Solution

    |

  4. A radioactive nucleus A has a single decay mode with half life tau(A)....

    Text Solution

    |

  5. Two species of radioactive atoms are mixed in equal number. The disint...

    Text Solution

    |

  6. .^22 Ne nucleus after absorbing energy decays into two alpha-particles...

    Text Solution

    |

  7. The compositon of an alpha particle can be expressed as

    Text Solution

    |

  8. During a negative beta decay,

    Text Solution

    |

  9. The energy spectrum of beta - particle [number N€ as a function of bet...

    Text Solution

    |

  10. M(x) and M(y) denote the atomic masses of the parent and the daughter ...

    Text Solution

    |

  11. Tritium is an isotope of hydrogen whose nucleus triton contains 2 neut...

    Text Solution

    |

  12. A nuclear decay is possible if the mass of the parent nucleus exceeds ...

    Text Solution

    |

  13. Carbon-II decays to boron-II according to the following formula. .(6...

    Text Solution

    |

  14. which a U^(238) nucleus original at rest , decay by emitting an alpha ...

    Text Solution

    |

  15. A nucleus of mass 218 amu in Free State decays to emit an alpha-partic...

    Text Solution

    |

  16. Radioactive .27^60Co is transformed into stable .28^60Ni by emitting t...

    Text Solution

    |

  17. In the given reaction .z X^A rarr .(z+1)Y^A rarr .(z-1) K^(A - 4) ra...

    Text Solution

    |

  18. Which of the following is in the increasing order for penetrating powe...

    Text Solution

    |

  19. A radioactive nucleus undergoes a series of deacy according to the sch...

    Text Solution

    |

  20. Three alpha-particle and one beta-particle decaying takes place in ser...

    Text Solution

    |