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 physics towards green energy electricity from nuclear energy nuclear power nuclear energy

From below which are the disadvantages of nuclear energy?

  1. High set up cost

  2. low set up cost

  3. Waste products are useful

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Energy generation from the nuclear energy is greater than from any non-conventional sources of energy. But it has some disadvantages too, such as:

1. Cost of nuclear power plant set up is very high.
2. Waste generated are hazardous to health and environment.

Multiple choice physics towards green energy electricity from nuclear energy nuclear power nuclear energy

In Kaiga Atomic Power reactor plant, the fuel that can be used is

  1. Coal

  2. Uranium

  3. Petrol

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

Kaiga Generating Station is a nuclear power generating station situated at Kaiga, near the river Kali, in Uttar Kannada district of Karnataka, India. The plant has been in operation since March 2000 and is operated by the Nuclear Power Corporation of India. The plant is fueled by indigenous Uranium.

Hence correct answer is option B. 

Multiple choice physics towards green energy electricity from nuclear energy nuclear power nuclear energy

The fusion reactions occur at

  1. low pressures

  2. high temperature

  3. extremely high temperature

  4. high temperature and low presences
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a duplicate of question 423192 testing the same concept. Nuclear fusion requires extremely high temperatures, approximately 100 million degrees Celsius, to overcome the electrostatic repulsion between positively charged nuclei. At such temperatures, matter exists as plasma and nuclei can fuse. The same principle applies here - fusion is a high-temperature process.

Multiple choice physics towards green energy electricity from nuclear energy nuclear power nuclear energy

Nuclear energy may become an important source of energy in the future.
Which one of the following statements about nuclear energy is NOT true?

  1. Large amounts of energy are produced by a small mass of fuel

  2. Nuclear energy has no harmful effects

  3. Nuclear energy produces heat on the sun

  4. Uranium is an important fuel for nuclear energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nuclear fuels are non-renewable sources of energy and large amount of radioactive materials, which are toxic in nature, are released in the environment which are extremely hazardous to the health of living being for thousands of years. Thus nuclear energy also has some harmful effects.

Whereas the statements given in (A), (C) and (D) are true.

Multiple choice physics energy management electricity from nuclear energy nuclear power nuclear energy

An atom bomb works on :

  1. Electrical energy

  2. Heat energy

  3. Mechanical energy

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

Atomic energy 

Atomic energy is the energy that is created by splitting apart the nuclei of atoms.  The atomic energy is released during the process of fission.  The basic principle of atom bomb is uncontrolled nuclear fission. 

Multiple choice physics energy management electricity from nuclear energy nuclear power nuclear energy

Principle of Hydrogen bomb is .................. reactions.

  1. Uncontrolled fusion

  2. Fission

  3. Controlled fusion

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A hydrogen bomb operates on the principle of uncontrolled nuclear fusion. Unlike fission bombs, which split heavy atoms, fusion bombs release energy by combining light nuclei in a rapid, explosive chain reaction.

Multiple choice physics energy management electricity from nuclear energy nuclear power nuclear energy

Which bomb works on the principle of Nuclear fusion ?

  1. Atom bomb

  2. Hydrogen bomb

  3. Neutron bomb

  4. Nuclear reactor
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nuclear fusion is a nuclear reaction in which two or more atomic nuclei at a very high speed and join to form a new type of atomic nucleus. Fusion reactions are high energy reactions in which two lighter atomic  nuclei fuse to form a heavier nucleus. This fusion reaction is taking place in hydrogen bomb.

Multiple choice physics life cycle of stars evolution and end stages of stars the stars stars

Why is iron significant to understanding how a supernova occurs? 

  1. Iron is the heaviest of all atomic nuclei, and thus no heavier elements can be made.

  2. Supernovae often leave behind neutron stars, which are made mostly of iron.

  3. The fusion of iron into uranium is the reaction that drives a supernova explosion.

  4. Iron cannot release energy either by fission or fusion.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Iron has the highest binding energy per nucleon of any element. Consequently, fusing iron consumes energy rather than releasing it, which removes the outward thermal pressure supporting a massive star's core, leading to gravitational collapse.

Multiple choice physics nuclei nuclear force the nuclear force nuclear force and binding energy

Mass numbers of the elements A, B, C and D are 30, 60, 90 and 120 respectively. the  specific binding energy of them are 5 MeV, 8.5 MeV, 8 MeV and 7 MeV respectively. then, in which of the following reaction/s energy is released?
(1) $ D \rightarrow 2B $
(2) $ C \rightarrow B+A $
(3) $ B \rightarrow 2A $

  1. only in (1)

  2. in(2), (3)

  3. in (1), (3)

  4. in (1), (2) and (3)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Energy is released when the product has a higher specific binding energy than the reactants. (1) D(7 MeV) -> 2B(8.5 MeV): 8.5 > 7, so energy is released. (2) C(8 MeV) -> B(8.5 MeV) + A(5 MeV): Average BE is (8.5+5)/2 = 6.75 < 8, so energy is absorbed. (3) B(8.5 MeV) -> 2A(5 MeV): 5 < 8.5, so energy is absorbed.

Multiple choice power work and power work, energy and power physics energy and its forms

If the average power radiated by the star is $10 ^ { 16 } \mathrm { W }$ , the deuteron supply of the star is exhausted in a time of the order of 

  1. $10 ^ { 6 }$ seccond
  2. $10 ^ { 14 }$ second
  3. $10 ^ { 12 }$ second
  4. $10 ^ { 16 }$ second
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is an order-of-magnitude estimation problem. Total energy available in a star's fuel (deuteron) is typically around 10^28 J. Time = Energy / Power = 10^28 / 10^16 = 10^12 seconds.