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

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

A

`6.25`

B

75

C

25

D

`93.75`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ATOMS, MOLECULES AND NUCLEI

    TARGET PUBLICATION|Exercise Evaluation test|19 Videos

  • ATOMS, MOLECULES AND NUCLEI

    TARGET PUBLICATION|Exercise Critical Thinking|62 Videos

  • CIRCULAR MOTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|11 Videos

Similar Questions

Explore conceptually related problems

The half life period of a radioactive substance is 10 year. The amount of the substance decayed after 40 years would be

The half-life of a radioactive substance is 10 days. This means that

The half life of radioactive substance is T. Then the fraction of the substance that has decayed in time t is-

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

what is the half -life of a radioactive substance if 75% of its given amount disintegrate in 60 min ?

Half-life of a radioactive substance is 2.9 days and the amount of substance is 10 mg. How many micrograms of the substance will be left after 29 days.

TARGET PUBLICATION-ATOMS, MOLECULES AND NUCLEI -Competitive Thinking
  1. A radio isotope X with a half-life 1.4 xx 10^9 years decays of Y which...

    Text Solution

    |

  2. Radioactive material 'A' has decay constant '8 lamda' and material 'B'...

    Text Solution

    |

  3. The half-life period of a radioactive substance is 5 min. The amount o...

    Text Solution

    |

  4. For a radioactive material, half-life is 10 minutes. If initially ther...

    Text Solution

    |

  5. Two radioactive materials have decay constant 5lambda&lambda. If initi...

    Text Solution

    |

  6. A radioactive material decays by simulataneous emission of two particl...

    Text Solution

    |

  7. A radioactive nucleus can decay by two different processes. The half l...

    Text Solution

    |

  8. If the half-life of a radioactive sample is 10 hours its mean life is

    Text Solution

    |

  9. A radioactive nucleus A with a half life T, decays into nucleus B. At ...

    Text Solution

    |

  10. The half-life of a radioactive element is 100 minutes . The time inte...

    Text Solution

    |

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

    Text Solution

    |

  12. Half life of a radio-active substance is 20 minutes. The time between ...

    Text Solution

    |

  13. Half-life of a radioactive substance A and B are, respectively, 20 min...

    Text Solution

    |

  14. A sample contains 16 gm of radioactive material, the half-life of whic...

    Text Solution

    |

  15. The half-life of tritium is 12.5 years. What mass of tritium of initia...

    Text Solution

    |

  16. A radioactive sample of half life 10 days contains 1000X nuclei. Numbe...

    Text Solution

    |

  17. A radioactive element has rate of disintegration 10,000 disintegrat...

    Text Solution

    |

  18. A certain radioactive element disintegration with a decay constant of ...

    Text Solution

    |

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

    Text Solution

    |

  20. If the half life of a radioactive nucleus is 3 days nearly, what fract...

    Text Solution

    |