Physics · Science General

Nuclear Physics and Energy

1,296 Questions

Access a comprehensive set of questions on nuclear physics, reactor mechanisms, and atomic energy. Topics include nuclear fission, plasma generation, and radiation control. These physics questions form a core part of the syllabus for various engineering and civil service exams.

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Nuclear Physics and Energy Questions

Multiple choice physics scientists inventions and inventors in science indian scientist: biography and achievements scientist and their achievements

$2$ December $1942$ is known for.

  1. The formation of the Big Bang theory

  2. The activation of the first operational nuclear reactor

  3. The creation of the first controlled chain reaction

  4. The development of the first thermonuclear device
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The world's first nuclear reaction, Chicago Pile-1 reached the stage of criticabty (ready for activation) on Dec'2 1942. The creation of 1st controlled chain reaction done on this day.

Multiple choice chemistry hard water and soft water heavy water study of heavy water hydrogen and its compounds

Heavy water is used as a:

  1. fuel in engines

  2. semiconductor

  3. moderator in nuclear reactors

  4. insulator in steam engines
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Answer:-

Heavy water is used in certain types of nuclear reactors, where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with the fissile uranium-235 than with uranium-238, which captures neutrons without fissioning.

Multiple choice chemistry hard water and soft water heavy water study of heavy water hydrogen and its compounds

Heavy water is used as _______ in nuclear reactor.

  1. controller

  2. moderator

  3. promoter

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heavy water acts as a neutron moderator in nuclear reactors to slow down neutrons so that they are more likely to react with the fissile $U _{235}$ than with $U _{238}$, which captures neutrons without fission process.

Multiple choice chemistry hard water and soft water heavy water study of heavy water hydrogen and its compounds

Atomic nuclear reactors use heavy water. This is different from ordinary water only to the extent that in place of hydrogen it contains:

  1. deuterium, a heavier isotope of hydrogen

  2. nitrogen, which is also a light element

  3. tritium, an heavier isotope of hydrogen

  4. a radioactive element
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heavy water $(D _2O)$ is a compound containing deuterium and oxygen. It is used in the atomic nuclear reactor as a moderator. It differs from ordinary water $(H _2O)$ only because it has Deuterium i.e. a heavy isotope of hydrogen.

Multiple choice chemistry hard water and soft water heavy water study of heavy water hydrogen and its compounds

Some of the major uses of heavy water are given below. Which one is not correct?

  1. It is used as a moderator in nuclear.

  2. It is used as a tracer compound for studying reaction mechanism

  3. High concentration of heavy water accelerates the growth of plants

  4. It is used in preparing deuterium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

High concentration of heavy water retards the growth of the plants. Tobacco seeds do not grow in heavy water.

Multiple choice chemistry hard water and soft water heavy water study of heavy water hydrogen and its compounds

Heavy water is used as a:

  1. fuel in engines

  2. semiconductor

  3. moderator in nuclear reactors

  4. insulator in steam engines
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heavy metals is used as a moderator in nuclear reactors to bring the fission reaction by slowing down the neutrons and capturing them. The main reason is that the heavy water captures less neutrons than the normal water. Later it can be used as a fuel which has not undergone enrichment to increase the percentage of Uranium-235

Multiple choice chemistry hydrogen and its compounds heavy water study of heavy water hard water and soft water

Heavy water $\displaystyle \left( { D } _{ 2 }O \right) $ is used in Atomic Reactors as -

  1. Coolant

  2. Controller

  3. Shield

  4. Moderator
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Moderator. e.g. , Heavy water, is a substance used in nuclear reactors of reduce the speed of fast Neutrons produced by nuclear fission.Moderator. e.g. , Heavy water, is a substance used in nuclear reactors of reduce the speed of fast Neutrons produced by nuclear fission.Moderator. e.g. , Heavy water, is a substance used in nuclear reactors of reduce the speed of fast Neutrons produced by nuclear fission.'

Multiple choice chemistry hydrogen and its compounds heavy water study of heavy water hard water and soft water

Heavy water is used in nuclear reactors as:

  1. source of $\alpha-$ particles

  2. slowing down the speed of high energy neutrons

  3. transporting heat of the reactor

  4. heating purpose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Heavy water is used in nuclear reactors, where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with the fissile $U^{235}$ than with $U^{238}$, which captures neutrons without fissioning.

Multiple choice separation of components of mixtures methods of separation elements, compounds and mixtures chemistry

_______is a technology used to produce enriched uranium by forcing gaseous uranium hexafluoride through semipermeable membranes.

  1. Gas solubility

  2. Gas condensation

  3. Solidification

  4. Gas diffusion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gaseous diffusion is a technology used to produce enriched uranium by forcing gaseous uranium hexafluoride through semipermeable membranes. This produces a slight separation between the molecules containing uranium-235 and uranium-238. By use of a large cascade of many stages, high separations can be achieved. 

Multiple choice biology carbon cycling mineral coal carbon cycle coal and its products coal petroleum and petrochemicals

The energy of a neutron released during a fission process should be reduced by about ______ part to convert it into a thermal neutron.

  1. $10^8$
  2. $10^9$
  3. $10^6$
  4. $10^2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
 $10^8$
Thermal neutron, any free neutron (one that is not bound within an atomic nucleus) that has an average energy of motion (kinetic energy) corresponding to the average energy of the particles of the ambient materials. Relatively slow and of low energy, thermal neutrons exhibit properties, such as large cross sections in fission, that make them desirable in certain chain-reaction applications. Furthermore, the long de Broglie wavelengths of thermal neutrons make them valuable for certain applications of neutron optics. Thermal neutrons are produced by slowing down more energetic neutrons in a substance called a moderator after they have been ejected from atomic nuclei during nuclear reactions such as fission.
Multiple choice botany ecosystem : structure and function energy flow in food chain food chain and energy flow energy flow in ecosystem

Amount of commercial energy being obtained from nuclear reactors in France is

  1. 35%

  2. 51%

  3. 73%

  4. 42%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Nuclear power is a major source of energy in France, with a 40% share of energy consumption in 2015. Nuclear power is the largest source of electricity in the country, with a generation of 379.1 TWh, or 71.6% of the country's total production of 519.4 TWh, the highest percentage in the world.  France's present electricity generation mix is a result of the French government deciding in 1974, just after the first oil shock, to expand rapidly the country's nuclear power capacity, using Westinghouse technology.
So the correct answer is '73%'.
Multiple choice evs when there is a disaster disaster and types disasters forest fire

The worst nuclear accident happened to date is occurred at

  1. Chernobyl in 1986

  2. Three Mile Power Plant in 1979

  3. Sellafield in 1957

  4. Fukushima in 2011
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Chernobyl disaster in 1986 is widely considered the most severe nuclear accident in history in terms of cost and casualties.

Multiple choice introduction to social movements and its types social movements sociology recent social movements social movements in our time

A major accident took place at which nuclear plant in USSR?

  1. Leningrad Nuclear Power Plant

  2. Chernobyl Nuclear Power Plant

  3. Kalinin Nuclear Power Plant

  4. Kursk Nuclear Power Plant
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During the last phase of the USSR, a major accident took place in its nuclear plant in Chernobyl. This caused the death of a large number of workers in Chernobyl. But more important, it contaminated the atmosphere of a very large region including many other countries of Europe. Its effects created a new awareness among the people of the world about the danger of nuclear power whether for peaceful or warlike purposes.