12th Class Physics Chapter 21 MCQs with Answers

AdminMarch 24, 2024

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Welcome to the 12th Class Physics Chapter 21 MCQs Practice and Quiz Tests. We are presenting you with top MCQ questions from the 12th Class Physics Chapter 21 Nuclear Physics.

You can find all the 12th Class Physics Chapter 21 MCQs online tests on our website. These online tests are great for learning and as well as for scoring maximum marks in your Intermediate Exams. We are making these Class 11 Physics MCQs online tests for those who want full marks in their exams.

12th Class Multiple Choice Question Chapter 21 with Answers Free PDF

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Grade 12 Physics Chapter 21 Online Quiz

By presenting 3 options to choose from, 12th Class Chapter 21 Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of 12th Class Questions and Answers and click over the correct answer.

Test Name: 12th Class Chapter 21 Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure high marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply comment below this post, so that we can update the answer in the quiz section.

1th Class Physics Ch 21: Nuclear Physics.

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1 / 40

What is the term for the process by which two light nuclei combine to form a heavier nucleus?

Nuclear fission

Radioactive decay

Nuclear fusion

2 / 40

What is the term for the process by which a nucleus undergoes a change, resulting in the emission of radiation?

Nuclear fission

Nuclear fusion

Radioactive decay

3 / 40

What is the term for the process by which a nucleus loses energy by emitting radiation?

Radioactive decay

Nuclear fusion

Nuclear fission

4 / 40

Who discovered radium and polonium in 1898?

Albert Einstein

Marie Curie

Ernest Rutherford

5 / 40

What is the term for the spontaneous disintegration of atomic nuclei?

Nuclear fusion

Nuclear fission

Radioactive decay

6 / 40

What is the term for the splitting of a heavy nucleus into two or more lighter nuclei?

Nuclear fusion

Radioactive decay

Nuclear fission

7 / 40

What is the total number of protons and neutrons in the nucleus of an atom?

Neutron number

Atomic number

Mass number

8 / 40

Who discovered the concept of nuclear isomers in 1921?

James Chadwick

Francis William Aston

Ernest Rutherford

9 / 40

What is the term for the number of neutrons in the nucleus of an atom?

Mass number

Neutron number

Atomic number

10 / 40

What is the term for the nuclei of the same element with different numbers of neutrons?

Isotopes

Isotones

Isobars

11 / 40

Who developed the first atomic bomb during World War II?

Enrico Fermi

J. Robert Oppenheimer

Albert Einstein

12 / 40

What is the process by which light atomic nuclei combine to form heavier nuclei?

Radioactive decay

Nuclear fission

Nuclear fusion

13 / 40

What is the smallest particle in the nucleus of an atom, having a positive electrical charge?

Proton

Neutron

Electron

14 / 40

What is the term for a stable nucleus splitting into two nuclei of roughly equal mass?

Spontaneous fission

Asymmetric fission

Symmetric fission

15 / 40

What is the process by which a nucleus spontaneously emits radiation?

Nuclear fission

Radioactive decay

Nuclear fusion

16 / 40

What is the process by which a heavy nucleus splits into two or more lighter nuclei?

Nuclear fission

Radioactive decay

Nuclear fusion

17 / 40

What is the term for the release of energy when a nucleus undergoes fission or fusion?

Nuclear energy

Kinetic energy

Thermal energy

18 / 40

What is the energy equivalent of one atomic mass unit (u)?

Approximately 931 MeV

Approximately 6.022 x 10^23 J

Approximately 1.6 x 10^-19 J

19 / 40

Who coined the term "nuclear fission" in 1939?

Otto Hahn

Lise Meitner

Enrico Fermi

20 / 40

What is the number of protons in an atom called?

Mass number

Atomic number

Neutron number

21 / 40

What is the term for the emission of particles or electromagnetic radiation from an atomic nucleus?

Radioactive decay

Nuclear fusion

Nuclear fission

22 / 40

What is the term for a material capable of sustaining a nuclear fission chain reaction?

Fusion material

Fissile material

Moderator

23 / 40

What is the process by which an unstable atomic nucleus loses energy by emitting radiation?

Nuclear fission

Nuclear fusion

Radioactive decay

24 / 40

Who discovered the neutron in 1932?

Niels Bohr

James Chadwick

Ernest Rutherford

25 / 40

What is the term for the time required for a quantity of radioactive material to decay to half its original value?

Half-life

Decay constant

Activity

26 / 40

Who developed the first controlled nuclear chain reaction in 1942?

J. Robert Oppenheimer

Niels Bohr

Enrico Fermi

27 / 40

Who discovered the concept of isotopes in 1913?

Ernest Rutherford

Frederick Soddy

Niels Bohr

28 / 40

What is the term for the time it takes for half of the radioactive nuclei in a sample to decay?

Decay constant

Half-life

Activity

29 / 40

Who discovered the concept of nuclear binding energy in 1935?

Lise Meitner

Fritz Strassmann

Enrico Fermi

30 / 40

What is the mass of a neutron in atomic mass units (u)?

Approximately 1 u

Approximately 1836 u

Approximately 1/1836 u

31 / 40

Who proposed the nuclear model of the atom in 1911?

J.J. Thomson

Niels Bohr

Ernest Rutherford

32 / 40

What is the process by which a heavy nucleus captures a neutron and forms an unstable nucleus?

Radioactive decay

Neutron capture

Nuclear fusion

33 / 40

Who discovered the concept of nuclear shell structure in 1949?

Maria Goeppert Mayer

Lise Meitner

Ernest Rutherford

34 / 40

Who discovered the phenomenon of nuclear chain reactions in 1934?

Lise Meitner

Otto Hahn

Enrico Fermi

35 / 40

Who discovered the phenomenon of nuclear fission in 1938?

Enrico Fermi

Otto Hahn

Lise Meitner

36 / 40

Who discovered the concept of nuclear force in 1935?

Hideki Yukawa

Enrico Fermi

J. Robert Oppenheimer

37 / 40

What is the term for the process by which a nucleus absorbs an electron and emits a neutrino?

Positron emission

Beta decay

Electron capture

38 / 40

What is the term for the spontaneous decay of an atomic nucleus with the emission of particles and/or electromagnetic radiation?

Nuclear fission

Nuclear fusion

Radioactive decay

39 / 40

Who discovered the concept of nuclear spins in 1924?

Otto Stern

Ernest Rutherford

James Chadwick

40 / 40

What is the term for the process of combining light nuclei to form heavier nuclei?

Nuclear fusion

Nuclear fission

Radioactive decay

Download Certificate of Quiz 12th Class Chapter 21

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AdminMarch 24, 2024

0 11 1 minute read