12th Class Physics Nuclear Physics And Radioactivity Question Bank

done Case Based (MCQs) - Nuclei Total Questions - 10

• question_answer1)

  Directions Q. 1 to 5: Read the following text and answer the following questions on the basis of the same:

  India's atomic energy programme:

  The atomic energy programme in India was launched around the time of independence under the leadership of Homi J. Bhabha (1909-1966). An early historic achievement was the design and construction of the first nuclear reactor in India (named Apsara) which went critical on August 4,

  1956. India indigenously designed and constructed plutonium plant at Trombay, which ushered in the technology of fuel reprocessing (separating useful fissile and fertile nuclear materials from the spent fuel of a reactor). Research reactors that have been subsequently commissioned include ZERLINA, PURNIMA (I, II and III), DHRUVA and KAMINI. KAMINI is the country's first large research reactor that uses U-233 as fuel. The main objectives of the Indian Atomic Energy programme are to provide safe and reliable electric power for the country's social and economic progress and to be self-reliant in all aspects of nuclear technology. Exploration of atomic minerals in India undertaken since the early fifties has indicated that India has limited reserves of uranium, but fairly abundant reserves of thorium.

  Accordingly, our country has adopted a three stage strategy of nuclear power generation. The first stage involves the use of natural uranium as a fuel, with heavy water as moderator. The Plutonium- 239 obtained from reprocessing of the discharged fuel from the reactors then serves as a fuel for the second stage - the fast breeder reactors. They are so called because they use fast neutrons for sustaining the chain reaction (hence no moderator is needed) and, besides generating power, also breed more fissile species (plutonium) than they consume. The third stage, most significant in the long term, involves using fast breeder reactors to produce fissile Uranium-233 from Thorium-232 and to build power reactors based on them.

  India's atomic energy programme was launched by:
  A)
  Shanti Swarup Bhatnagar done clear
  B)
  Homi J. Bhabha done clear
  C)
  Meghnad Saha done clear
  D)
  Daulat Singh Kothari done clear
  View Solution play_arrow

• question_answer2)
  First nuclear reactor of India :
  A)
  APSARA     done clear
  B)
  ZERLINA done clear
  C)
  DHRUBA done clear
  D)
  KAMINI done clear
  View Solution play_arrow

• question_answer3)
  Which one of the following is not a nuclear reactor?
  A)
  PURNIMA  done clear
  B)
  DHRUVA done clear
  C)
  KAMINI done clear
  D)
  ARYABHATTA done clear
  View Solution play_arrow

• question_answer4)
  The main objectives of the Indian Atomic Energy programme:
  A)
  Development of Nuclear weapons for success in warfare done clear
  B)
  Generation of safe and reliable electric power done clear
  C)
  Efficient medical treatment done clear
  D)
  To breed more fissile species done clear
  View Solution play_arrow

• question_answer5)
  India has limited reserves of ................. but fairly abundant reserves of.................:
  A)
  Plutonium, Thorium done clear
  B)
  Thorium, Uranium done clear
  C)
  Plutonium, Uranium done clear
  D)
  Uranium, Thorium done clear
  View Solution play_arrow

• question_answer6)

  Directions Q. 6 to 10: Read the following text and answer the following questions on the basis of the same:

  Grand Unification Theory;

  There are four fundamental forces in the universe

  •Gravitational force

  •Electromagnetic force

  •The weak nuclear force

  •The strong nuclear force

  The weak and strong forces are effective only over a very short range and dominate only at the level of subatomic particles.

  Gravitational force and Electromagnetic force have infinite range.

  The Four Fundamental Forces and their strengths

  (i) Gravitational Force - Weakest force; but has infinite range.

  (ii) Weak Nuclear Force - Next weakest; but short range,

  (iii) Electromagnetic Force - Stronger, with infinite range.

  (iv) Strong Nuclear Force - Strongest; but short range.

  Unification:

  •The weak nuclear force and electromagnetic force have been unified under the Standard Electroweak Theory, (Glashow, Weinberg and Salaam were awarded the Nobel Prize for this in

  1979).

  •Grand unification theories attempt to treat both strong nuclear force and electroweak force under the same mathematical structure.

  •Theories that add gravitational force to the mix and try to unify all four fundamental forces into a single force are called Superunified Theories. It has not yet been successful.

  What are the 4 fundamental forces?
  A)
  Gravitational force, electromagnetic force, nuclear force. Tension force done clear
  B)
  Gravitational force, electromagnetic force, nuclear force, Frictional force done clear
  C)
  Gravitational force, electromagnetic force, weak nuclear force, strong nuclear force done clear
  D)
  Frictional force, electric force, nuclear force, magnetic force done clear
  View Solution play_arrow

• question_answer7)
  Which fundamental force is always attractive?
  A)
  Electric force done clear
  B)
  Magnetic force done clear
  C)
  Gravitational force done clear
  D)
  Strong nuclear force done clear
  View Solution play_arrow

• question_answer8)
  Which two fundamental forces have been unified by Standard Electroweak Theory?
  A)
  Weak nuclear force and electromagnetic force done clear
  B)
  Strong nuclear force and electromagnetic force done clear
  C)
  Gravitational force and electromagnetic force done clear
  D)
  Weak nuclear force and strong nuclear force done clear
  View Solution play_arrow

• question_answer9)
  Which one is the weakest force?
  A)
  Weak nuclear force done clear
  B)
  Electromagnetic force done clear
  C)
  Strong magnetic force done clear
  D)
  Gravitational force done clear
  View Solution play_arrow

• question_answer10)
  Which of the following forces have infinite ranges?
  A)
  Weak nuclear force and strong nuclear force done clear
  B)
  Gravitational force and Electromagnetic force done clear
  C)
  Weak nuclear force and Gravitational force done clear
  D)
  All the forces done clear
  View Solution play_arrow