Home
Class 12
PHYSICS
After three half lives, the percentage o...

After three half lives, the percentage of fraction of amount a).35 b)12.5 c)50 d)75

A

0.01

B

0.003

C

0.03125

D

0.002

Text Solution

Verified by Experts

The correct Answer is:
C
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

If the circumference of a circle is decreased by 50% then the percentage of decrease in its area is (a) 25 (b) 50 (c) 60 (d) 75

Convert the given decimal fractions to per cents.(a) 0.65 (b) 2.1 (c) 0.02 (d) 12.35

The ratio of urea and potash in a mixed fertilizer is 7:3. Express the quantity of urea present a percentage of the total amount of fertilizer.20% b.50% c.60% d.70%

Two number are respectively 12(1)/(2)%(:and backslash25% more than a third number. The fist number as a percentage of the second number is a.60b.50c.75d.90

An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol present in the tank? 33. 5 % b. 37. 5 % c. 40 % d. 50 %

After a time equal to four half lives, the amount of radioactive material remaining undecayed is-

The cost price of an article is 64% of the marked price.Calculate the gain percent after allowing a discount of 12%.37.5% b.48% c.52% d.50.5%

If each edge of a cube is increased by 25%, then the percentage increase in its surface area is: (a) 25% (b) 48.75% (c) 50% (d) 56.25%

The length of a rectangle is halved,while its breadth is tripled.What is the percentage change in area? 25% increase (b)50% increase (c) 50% decrease (d) 75% decrease

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

    |