Quantum Electrodynamics MCQs with Answers

Welcome to the Quantum Electrodynamics MCQs with Answers. In this post, we have shared Quantum Electrodynamics Online Test for different competitive exams. Find practice Quantum Electrodynamics Practice Questions with answers in Physics Tests exams here. Each question offers a chance to enhance your knowledge regarding Quantum Electrodynamics.

Quantum Electrodynamics Online Quiz

By presenting 3 options to choose from, Quantum Electrodynamics 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 Quantum Electrodynamics Questions and Answers and click over the correct answer.

• Test Name: Quantum Electrodynamics MCQ 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 click on question and comment below that question. so that we can update the answer in the quiz section.

0

---

Quantum Electrodynamics

Please fill out the form before starting Quiz.

1 / 40

What is the role of the Ward identity in QED?

Measures photon polarization

Describes electron spin

Ensures charge conservation

2 / 40

What is the primary method for calculating QED processes?

Statistical mechanics

Classical mechanics

Perturbation theory

3 / 40

What is Compton scattering?

Scattering of photons by electrons

Scattering of electrons by neutrons

Scattering of protons by neutrons

4 / 40

What is pair production?

Creation of two photons from an electron

Creation of an electron and positron from a photon

Absorption of a photon by an electron

5 / 40

What does the term "vertex function" describe in QED?

Interaction point in Feynman diagrams

Shape of the electron orbit

Spin of the photon

6 / 40

What does the term "running coupling constant" mean in QED?

Coupling constant is zero

Coupling constant is fixed

Coupling constant depends on energy scale

7 / 40

What equation governs the behavior of the electron in QED?

Maxwell's equations

Schrödinger equation

Dirac equation

8 / 40

What is the physical interpretation of a Feynman diagram?

Position of a particle in space

Space-time evolution of particle interactions

Energy levels of atoms

9 / 40

What is the main result of the anomalous magnetic moment of the electron?

Deviation from the predicted value

No observable effect

Exact match with predicted value

10 / 40

What is Thomson scattering?

Inelastic scattering of photons

Scattering of electrons by neutrons

Elastic scattering of photons by free electrons

11 / 40

What is the primary focus of QED?

Interaction of light and matter

Nuclear reactions

Gravitational interactions

12 / 40

What is the Dirac sea concept?

Infinite sea of negative energy states

Sea of positive energy states

Classical field

13 / 40

What is the basic vertex in a QED Feynman diagram?

Electron-electron interaction

Photon-photon interaction

Electron-photon interaction

14 / 40

What is the Casimir effect in the context of QED?

Force between charged particles

Attractive force between uncharged plates due to vacuum fluctuations

Magnetic interaction

15 / 40

What is the fine-structure constant?

A dimensionless constant characterizing the strength of the electromagnetic interaction

The mass of the electron

The charge of the proton

16 / 40

What is the significance of the Coulomb gauge in QED?

Describes magnetic interactions

Measures particle energy

Simplifies the equations of motion

17 / 40

What does the term "asymptotic freedom" mean in QED?

Coupling decreases at high energies

Does not apply to QED

Coupling increases at low energies

18 / 40

What is the Lamb shift?

Small difference in energy levels due to QED effects

Absence of energy levels

Large energy difference

19 / 40

What does the term "vertex correction" refer to in QED?

A higher-order correction to the interaction vertex

A type of particle decay

A change in the particle mass

20 / 40

What is the role of virtual particles in QED?

Always observable

Never appear in calculations

Mediate interactions

21 / 40

What is the vacuum polarization effect?

Absorption of light by a medium

Modification of the vacuum by virtual particles

Creation of real particles from the vacuum

22 / 40

What is the primary difference between QED and QCD?

QED deals with gravity

QED deals with electromagnetism, QCD with strong interactions

QED deals with weak interactions

23 / 40

What is a photon in QED?

Quantum of the electromagnetic field

Quantum of the gravitational field

Particle with mass

24 / 40

Who is one of the founding fathers of QED?

Albert Einstein

Isaac Newton

Richard Feynman

25 / 40

What is the Bethe-Heitler process?

Fusion of two nuclei

Pair production in the Coulomb field of a nucleus

Decay of a neutron

26 / 40

What is the role of the Lorentz force in QED?

Calculates energy levels

Measures particle mass

Describes force on a charged particle in an electromagnetic field

27 / 40

Who introduced the path integral formulation in QED?

Wolfgang Pauli

Richard Feynman

Paul Dirac

28 / 40

What particles are primarily involved in QED?

Electrons and photons

Protons and neutrons

Quarks and gluons

29 / 40

What is the propagator in QED?

A function that describes the probability amplitude for a particle to travel from one point to another

The mass of a particle

A measure of particle spin

30 / 40

What is the fundamental interaction described by QED?

Weak nuclear

Electromagnetic

Strong nuclear

31 / 40

What is the Heisenberg uncertainty principle in QED?

Position and momentum cannot both be precisely measured

Energy is conserved

Speed of light is constant

32 / 40

What is the Euler-Heisenberg Lagrangian?

Effective Lagrangian for QED at low energies

Potential energy of a proton

Kinetic energy of an electron

33 / 40

What does the term "cross section" mean in QED?

Energy of scattered particles

Measure of the probability of scattering

Distance between particles

34 / 40

What is the role of gauge invariance in QED?

Measures particle charge

Describes the shape of the electron

Ensures consistency of the theory

35 / 40

What does the Feynman diagram represent in QED?

Trajectories of planets

Interaction of particles

Quantum state of atoms

36 / 40

What is the Lippmann-Schwinger equation used for in QED?

Describes scattering processes

Measures particle decay

Calculates particle mass

37 / 40

What is bremsstrahlung?

Scattering of light by atoms

Interaction between neutrons

Radiation emitted by charged particles when decelerated

38 / 40

What is the role of virtual photons in QED?

Measure particle speed

Describe real particles

Mediate electromagnetic interactions

39 / 40

What is the significance of renormalization in QED?

Remove infinities from calculations

Simplify classical equations

Increase energy of particles

40 / 40

What does the term "self-energy" refer to in QED?

Energy of a particle in motion

Correction to the mass of a particle

Potential energy of an electron

0%

Restart quiz

Download Certificate of Quiz Quantum Electrodynamics

On the end of Quiz, you can download the certificate of the quiz if you got more than 70% marks. Add a certificate to your job application or social profile (like LinkedIn) and get more job offers.

Download Quantum Electrodynamics MCQs with Answers Free PDF

You can also download 100 Quantum Electrodynamics Questions with Answers free PDF from the link provided below. To Download file in PDF click on the arrow sign at the top right corner.

If you are interested to enhance your knowledge regarding  English, Chemistry, Computer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.