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.

Nuclear reactor componentsAtomic energy generationPlasma reactorsNuclear fusionRadiation control

Nuclear Physics and Energy Questions

Multiple choice chemistry the p-block elements - group 13 study of diborane some important compounds of boron study of boron

A boron carbide rod is used in a nuclear reactor, because boron $( ^{10}B )$ has a very:

  1. low area of cross-section for capturing neutrons

  2. high area of cross-section for capturing neutrons

  3. low area of cross-section for capturing protons

  4. high area of cross-section for capturing electrons
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The wide absorption spectrum of boron makes it suitable also as a neutron shield. Larger the cross-sectional area more the number of thermal neutrons get captured in a nuclear reactor.

Multiple choice geography irrigation and power generation of electricity exploration and conservation of minerals secondary sector : industry

The power generated from the energy released by rearrangement of atomic nuclear is called _____________.

  1. thermal power

  2. geothermal power

  3. nuclear power

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

Nuclear or Atomic Energy is obtained by altering the structure of atoms. When such an alteration is made, much energy is released in the form of heat and this is used to generate electric power.

Multiple choice nuclear reactions nuclear structure nuclei atomic nuclei physics

In a working nuclear react, cadmium rods (control rods) are used to:-

  1. Speed up neutrons

  2. Slow down neutrons

  3. Absorb some neutrons

  4. Absorb all neutrons
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cadmium rods are used in nuclear reactors to absorb neutrons, which helps control the rate of the fission chain reaction.

Multiple choice nuclear reactions nuclear structure nuclei atomic nuclei physics

The difference between a nuclear reactor and an atomic bomb is that

  1. no chain reaction takes place in nuclear reactor while in the atomic bomb there is a chain reaction

  2. the chain reaction in nuclear reactor is controlled

  3. the chain reaction in nuclear reactor is not controlled

  4. no-chain reaction takes place in atomic bomb while it takes place in nuclear reactor
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The chain reaction in nuclear reactor is controlled 

Both in nuclear reactor and atomic bomb nuclear fission takes place. But in nuclear reactor controlled fission chain reaction takes place while in atomic bomb chain reaction is uncontrolled. 

Multiple choice chemistry energy production nuclear reactor the nuclear power station isotopes and nuclear chemistry

The critical mass of fissionable $U^{235}$ can be reduced by

  1. adding impurities

  2. heating material

  3. surrounding it by a neutron-reflecting material

  4. surrounding it by a neutron-absorbing material
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Surrounding a spherical critical mass with a neutron reflector reduces the mass needed for criticality.
A common material for a neutron reflector is beryllium metal.

Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

In nuclear reactor, Cadmium rods are used as

  1. Fuel

  2. Moderator

  3. Control Rods

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

Cadmium, Boron and Steel rods are used as control rods in a nuclear reactor.
Commonly moderators are Heavy water, graphite and Beryllium and Berillium oride.
Common fuels are Uranium $(^{238}U)$, enriched Uranium $(^{235}U)$ and plutonium $(^{236}{Pu})$ and $^{232}{Th}$