AllInfoHub – MCQ Practice

Electromagnetics (ECE Perspective) – Multiple Choice Questions (MCQs)

13. The force on a charge q moving with velocity v in a magnetic field B is given by:
- A. F = qE
- B. F = q(v x B)
- C. F = q(E + v x B)
- D. F = qvB
14. The divergence of the magnetic flux density (∇ ⋅ B) is always:
- A. Zero
- B. Non-zero
- C. Positive
- D. Negative
15. Faraday's Law of Electromagnetic Induction states that the induced EMF in a closed loop is equal to the negative rate of change of:
- A. Electric flux
- B. Magnetic flux
- C. Current
- D. Voltage
16. Lenz's Law states that the direction of the induced current is such that it ________ the change in magnetic flux that produced it.
- A. Aids
- B. Opposes
- C. Is independent of
- D. Is perpendicular to
17. Maxwell's equations are a set of ________ differential equations that describe the behavior of electric and magnetic fields.
- A. Two
- B. Three
- C. Four
- D. Five
18. The term 'displacement current' was introduced by:
- A. Faraday
- B. Ampere
- C. Maxwell
- D. Gauss
19. Which of Maxwell's equations describes the generation of a magnetic field by a time-varying electric field?
- A. Gauss's Law for Electric Fields
- B. Gauss's Law for Magnetic Fields
- C. Faraday's Law
- D. Ampere's Circuital Law with Maxwell's addition
20. The speed of an electromagnetic wave in a vacuum is given by:
- A. c = 1/√(μ₀ε₀)
- B. c = √(μ₀ε₀)
- C. c = μ₀ε₀
- D. c = 1/(μ₀ε₀)
21. The Poynting vector S represents the:
- A. Energy flow per unit area per unit time
- B. Power per unit volume
- C. Electric field intensity
- D. Magnetic field intensity
22. In a uniform plane wave
- A. the electric field E and magnetic field H are:
- B. Parallel
- C. Perpendicular
- D. At 45 degrees
23. The intrinsic impedance of free space is approximately:
- A. 377 ohms
- B. 120 ohms
- C. 75 ohms
- D. 50 ohms
24. The skin depth of a good conductor increases with:
- A. Increase in frequency
- B. Decrease in conductivity
- C. Decrease in permeability
- D. Increase in frequency and conductivity

« Prev 1 2 3 4 5 6 7 8 9 Next »

Electromagnetics (ECE Perspective) – Multiple Choice Questions (MCQs)

13. The force on a charge q moving with velocity v in a magnetic field B is given by:

14. The divergence of the magnetic flux density (∇ ⋅ B) is always:

15. Faraday's Law of Electromagnetic Induction states that the induced EMF in a closed loop is equal to the negative rate of change of:

16. Lenz's Law states that the direction of the induced current is such that it ________ the change in magnetic flux that produced it.

17. Maxwell's equations are a set of ________ differential equations that describe the behavior of electric and magnetic fields.

18. The term 'displacement current' was introduced by:

19. Which of Maxwell's equations describes the generation of a magnetic field by a time-varying electric field?

20. The speed of an electromagnetic wave in a vacuum is given by:

21. The Poynting vector S represents the:

22. In a uniform plane wave

23. The intrinsic impedance of free space is approximately:

24. The skin depth of a good conductor increases with:

Quick Links