Home
Class 12
PHYSICS
The fraction of heavy water in a nuclear...

The fraction of heavy water in a nuclear reactor is to.

A

increase the neutrons

B

slow down the neutrons

C

stop the electrons

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
B
(b) A nuclear reactor is a device in which a self-sustaining controlled chain reaction is produced in a fissionable material. A nuclear reactor consists of a moderator which is used to slow down the neutrons. Heavy water is the best moderator.
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR PHYSICS

    A2Z|Exercise Assertion- Reason|10 Videos

  • NUCLEAR PHYSICS

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • NUCLEAR PHYSICS

    A2Z|Exercise AIPMT/NEET Questions|52 Videos

  • MOCK TEST

    A2Z|Exercise Mock Test 3|44 Videos

  • SEMICONDUCTOR ELECTRONICS

    A2Z|Exercise EXERCISE|29 Videos

Similar Questions

Explore conceptually related problems

Nuclear Reactors

Discuss the importance of heavy water in nuclear reactor.

The purpose of using heavy water in nuclear reactior is

The function of the cadmium rod in a nuclear reactor is

What is the role of heavy water in a nuclear reactor?

The coolant in the nuclear reactor is

Heavy water is used in nuclear reactors as

Knowledge Check

  • The function of a moderator in a nuclear reactor is?

    A
    To moderate the number of secondary nuclei
    B
    To control the fission reaction
    C
    To increase the number of fissile (or fissionable) nuclei
    D
    To slow down the secondary neutrons

  • The purpose of using heavy water in nuclear reactior is

    A
    to increase the energy released in nuclear fission
    B
    to cool the rector to room temperature
    C
    to make the dynamo blades to woek wall
    D
    to decrease th energy of fast neutrons to the thermal energy

  • The function of the cadmium rod in a nuclear reactor is

    A
    to produce rays
    B
    to produce neutrons
    C
    to absorb neutrons
    D
    to speed up neutrons
    • A2Z-NUCLEAR PHYSICS-AIIMS Questions
    1. The fraction of heavy water in a nuclear reactor is to.

      Text Solution

      |

    2. Which one of the following has the highest neutrons ratio ?

      Text Solution

      |

    3. When radioactive substance emits an alpha-particle, then its position ...

      Text Solution

      |

    4. In an atom bomb, the energy is released because of the.

      Text Solution

      |

    5. The flux of alpha-particle at 2^@ is 1 xx 10^6. The flux of alpha-part...

      Text Solution

      |

    6. A laser beam is used for carrying our surgery because it

      Text Solution

      |

    7. If a radioactive substance reduces to (1)/(16) of its original mass in...

      Text Solution

      |

    8. The dependence of binding energy per nucleon, BN on the mass number, A...

      Text Solution

      |

    9. A radioactive nucleus undergoes alpha-emission to form a stable elemen...

      Text Solution

      |

    10. When and electron-positron pair annihilates, the energy released is ab...

      Text Solution

      |

    11. A radioactive material has half-life of 10 days. What fraction of the ...

      Text Solution

      |

    12. The operation of a nuclear reactor is said to be critical, if the mult...

      Text Solution

      |

    13. .(92)^(238)U has 92 protons and 238 nucleons. It decays by emitting an...

      Text Solution

      |

    14. The fossil bone has a .^(14)C : .^(12)C ratio, which is [(1)/(16)] of ...

      Text Solution

      |

    15. Which one of the following is a possible nuclear reaction ?

      Text Solution

      |

    16. Starting with a sample of pure .^66 Cu, 7//8 of it decays into Zn in 1...

      Text Solution

      |

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

      Text Solution

      |

    18. 200 MeV of energy may be obtained per fission of U^235. A reactor is g...

      Text Solution

      |

    19. In the reaction .1^2 H + .1^3 H rarr .2^4 He + .0^1 n, if the binding ...

      Text Solution

      |

    20. In a radioactive substance at t = 0, the number of atoms is 8 xx 10^4....

      Text Solution

      |