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Nuclear Physics MCQs

Nuclear Physics MCQs

Nuclear physics is the branch of physics that is focused on the study of atomic nuclei, their constituents, interactions, and reactions. Nuclear Physics finds its practical applications in a large number of fields including nuclear power, nuclear weapons, nuclear medicine and magnetic resonance imaging, industrial and agricultural isotopes, ion implantation in materials engineering, and radiocarbon dating in geology and archaeology.

MCQs.net presents top 10 MCQs on Nuclear Physics.

Alpha particles comprise of

Alpha particles comprises of:

  1. 1 proton 1 neutrons
  2. 1 proton 2 neutrons
  3. 2 proton 1 neutrons
  4. 2 proton 2 neutrons

Correct answer: 4. 2 proton 2 neutrons

One AMU equals

One AMU equals

  1. 1.66 x 10-27 kg
  2. 166 x 10-20 g
  3. Both of these
  4. None of these

Correct answer: 3. Both of these

The radiation that possesses maximum penetrating power

The radiation that possesses maximum penetrating power

  1. X-rays
  2. B-rays
  3. γ-rays
  4. All have same penetrating power

Correct answer: 3. γ-rays

Explanation:

RadiationRange (cm)Ionising powerCan pass through paper?Can pass through 5mm of aluminiumCan it pass through 5 cm of leadElectrical field deflection
Alpha3-5Highly ionisingNoNoNoDeflected towards negative plate
Betaaround 15IonisingYesNoNoDeflected towards positive plate
GammaMuch longerWeakly ionisingYesYesNo. Although some will still get throughNo

The most useful tracer is

The most useful tracer is

  1. CA-41
  2. C-14
  3. Sr-90
  4. I-131

Correct answer: 2. C-14

Explanation: A radioactive tracer also sometimes known as radiotracer, or radioactive label is a chemical compound wherein one or more atoms have been replaced by a radionuclide so by virtue of its radioactive decay it can be employed to explore the mechanism of chemical reactions by tracing the path that the radioisotope follows from reactants to products. Of mentioned tracers, C-14 is most useful. Carbon-14 or radiocarbon, is a radioactive isotope of carbon that has an atomic nucleus having 6 protons and 8 neutrons.

A nuclear power plant converts __________ energy to __________ energy

A nuclear power plant converts __________ energy to __________ energy:

  1. Electrical, Nuclear
  2. Nuclear, Chemical
  3. Nuclear, Mechanical
  4. Nuclear, Electrical

Correct answer: 4. Nuclear, Electrical

Explanation: A nuclear power plant converts nuclear energy into electrical energy. In a nuclear power station, heavy elements such as Uranium, Thorium are subjected to the fission process in a nuclear reactor. The generated heat energy is used for raising steam at high temperatures and pressure. This steam is used to run the steam turbine which converts steam energy into mechanical energy.

The number of neutrons in the nucleus of uranium are

The number of neutrons in the nucleus of uranium are

  1. 92
  2. 238
  3. 342
  4. Different for different isotopes

Correct answer: 4. Different for different isotopes

Explanation: Uranium has an atomic number of 92. It has 92 protons and 92 electrons in its atomic structure. The U-238 has 146 neutrons in the nucleus, while U-235 has 143 neutrons. However, the number of neutrons can vary from 141 to 146.

Gamma rays are used to kill bacteria and to sterilize surgical equipment due to which feature

Gamma rays are used to kill bacteria and to sterilize surgical equipment due to which feature

  1. Chargeless
  2. Massless
  3. High penetrating power
  4. All of these

Correct answer: 3. High penetrating power

During fusion of hydrogen in helium

During fusion of hydrogen in helium

  1. Energy is released
  2. Energy is absorbed
  3. Mass is increased due to energy absorption
  4. Mass is reduced due to the energy released

Correct answer: 1. Energy is released

Explanation: In the core of sun, hydrogen is being converted into helium. This process is known as nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom. During the process some of the mass is converted into energy.

CFCs are used in

CFCs are used in

  1. Aerosol spray
  2. Plastic foam industry
  3. Refrigeration
  4. All of above

Correct answer: 4. All of these

The point that should be kept in mind while selecting site for nuclear power plant

The point that should be kept in mind while selecting site for nuclear power plant:

  1. Waste disposal
  2. Availability of water
  3. Distance from population
  4. All of these

Correct answer: 4. All of these

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