Physics · Science General

Nuclear Physics and Energy

1,324 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.

Nuclear reactor componentsAtomic energy generationPlasma reactorsNuclear fusionRadiation control

Nuclear Physics and Energy Questions

Multiple choice

What does the word "nuclear" mean?

  1. having to do with the nucleus of an atom

  2. having to do with explosions

  3. having to do with bright lights

  4. having to do with hot temperatures
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The term nuclear refers to the nucleus of an atom. Nuclear reactions, such as fusion and fission, involve changes to the atomic nucleus.

Multiple choice

Where does "nuclear fusion" take place?

  1. the core of stars

  2. the outer surface of stars

  3. inside of planets

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

Nuclear fusion requires the extreme temperatures and pressures found only in the cores of stars. These conditions allow atomic nuclei to overcome electrostatic repulsion and fuse.

Multiple choice

The process of nuclear fusion produces two things...

  1. energy and new elements

  2. gas and dust

  3. explosions and supernovas

  4. calcium and iron
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nuclear fusion combines lighter atomic nuclei into heavier ones, releasing a significant amount of energy in the process. This energy is what powers stars.

Multiple choice

What is a byproduct of nuclear energy?

  1. flooding

  2. radioactive waste

  3. sulfur dioxide

  4. natural gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nuclear power plants produce radioactive waste as a byproduct of the fission process, which requires specialized long-term storage.

Multiple choice some important compounds of magnesium and calcium the s-block elements chemistry

Valves of an iron chamber used in the manufacturing of superphosphate opens in a big chamber called _________.

  1. reactor

  2. vessel

  3. den

  4. control room
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A well powdered phosphate rock or bone ash mixed known quantity of concentrate sulphuric acid is introduced into a cast iron chamber provided with mechanical stirrer and two valves at bottom. Each valve opens in a big chamber called den. The mixture is stirred for 2 to 5 minutes and then  dumped mechanically into one of the dens through the valve. The mass is kept in the den for about 24 hours.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which one of the following pair is mismatched?

  1. Nuclear power- radioactive wastes

  2. Solar energy- greehouse effect
  3. Fossil fuel burning- release of CO$ _2$
  4. Biomass burning- release of CO$ _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Nuclear power will generate lots of radioactive wastes which is harmful to the animals and plants.
Solar energy coming to the earth is not responsible for the greenhouse effect. It is the increase in greenhouse gasses in the atmosphere like CO$ _2$, methane and CFC which is released by complete combustion of fossil fuels or biomass in industries or transportation vehicles that prevent the re-radiation of infrared radiation from the earth and result in the increase in temperature of the earth.
The burning of fossil fuels and biomass releases carbon dioxide which thereby causes global warming. 
Therefore, the correct answer is option B.
Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which one of the following pairs in mismatched-

  1. Nuclear power radioactive wastes

  2. Solar energy green house effect
  3. Fossil fuel burning release of $CO _{2}$
  4. Biomass burning release of $CO _{2}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Solar energy decreases greenhouse gas emissions. Generating electricity with solar power instead of fossil fuels can dramatically reduce greenhouse gas emissions, particularly carbon dioxide (C$O _2$). Greenhouse gases, which are produced when fossil fuels are burned, lead to rising global temperatures and climate change.

So, the correct answer is 'Solar energy green house effect'.
Multiple choice stefan's law black body radiation heat transfer thermal properties physics

In the nuclear fusion, $ _{1}^{2}{H}+ _{1}^{3}{H}\rightarrow _{2}^{4}{He}+n$ given that the repulsive potential energy between the two nuclie is $7.7\times 10^{-14}J$, the temperature at which the gases must be heated to initiate the reaction is nearly [Boltzmann's constant $k=1.38\times 10^{-23}J/K$]-

  1. $10^{7}K$
  2. $10^{5}K$
  3. $10^{3}K$
  4. $10^{9}K$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Energy    $E \approx kT$

So,     $7.7\times 10^{-14} \approx 1.38\times 10^{-23}\times T$
$\implies \ T\approx  5.6\times 10^9 \ K$
Correct answer is option D.

Multiple choice geography manufacturing industries in india - i : agro-based location of industries distribution and classification of industries in india industrialisation and industrial belts

Heavy water plants are generally located near ______.

  1. Major irrigation projects

  2. Hydroelectric projects

  3. Fertilizer plants

  4. Nuclear power plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heavy water plants are generally located near fertilizer plants. Heavy water  is used in the production  of fertilisers , so it is often seen that heavy water plants are  near  to the fertilisers industry. As the plants  are near, the cost of transportation gets reduced and use of heavy water  can be proper without any wastage.

Multiple choice

What is the famous equation that relates mass and energy?

  1. $E = mc^2$
  2. $E = hv$
  3. $F = ma$
  4. $E = kT$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The equation $E = mc^2$ is one of the most famous and important equations in physics, expressing the equivalence of mass and energy.

Multiple choice

What is the primary function of a nuclear reactor control system?

  1. To maintain a constant reactor power level

  2. To prevent reactor accidents

  3. To monitor reactor parameters

  4. To control the flow of coolant through the reactor
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The primary function of a nuclear reactor control system is to maintain a constant reactor power level by adjusting the position of the control rods.