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

37. Laplace's equation is a special case of Poisson's equation when the charge density is:
- A. Positive
- B. Negative
- C. Zero
- D. Constant
38. The boundary condition for the normal component of the electric flux density at the interface between two dielectric media with no surface charge is that it is:
- A. Discontinuous
- B. Continuous
- C. Zero
- D. Infinite
39. The capacitance of a parallel plate capacitor is inversely proportional to the:
- A. Distance between plates
- B. Area of plates
- C. Dielectric strength
- D. Applied voltage
40. The unit of magnetic field intensity is:
- A. Tesla
- B. Weber
- C. Ampere/meter
- D. Henry
41. The magnetic flux density B and magnetic field intensity H are related by:
- A. B = μH
- B. H = μB
- C. B = μ₀H
- D. H = μ₀B
42. The force between two parallel current-carrying conductors is attractive if the currents are flowing in:
- A. Opposite directions
- B. The same direction
- C. Perpendicular directions
- D. Any direction
43. The inductance of a solenoid is proportional to the square of the number of turns and proportional to the:
- A. Length
- B. Area
- C. Volume
- D. Current
44. The energy stored in an inductor is given by:
- A. ½LI²
- B. ½CV²
- C. LI
- D. CV
45. What is the main characteristic of a perfect dielectric material?
- A. High conductivity
- B. High permeability
- C. No free charges
- D. Low breakdown strength
46. The divergence of the electric flux density D is equal to the volume charge density ρv. This is known as:
- A. Ampere's Law
- B. Faraday's Law
- C. Gauss's Law for Electric Fields
- D. Biot-Savart Law
47. The curl of the magnetic field H is equal to the conduction current density J plus the displacement current density ∂D/∂t. This is:
- A. Ampere's Circuital Law with Maxwell's addition
- B. Faraday's Law
- C. Gauss's Law for Magnetism
- D. Biot-Savart Law
48. The integral form of Faraday's Law is:
- A. ∮ E ⋅ dl = -d/dt ∫ B ⋅ dS
- B. ∮ D ⋅ dS = ∫ ρv dV
- C. ∮ H ⋅ dl = ∫ (J + ∂D/∂t) ⋅ dS
- D. ∮ B ⋅ dS = 0

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

37. Laplace's equation is a special case of Poisson's equation when the charge density is:

38. The boundary condition for the normal component of the electric flux density at the interface between two dielectric media with no surface charge is that it is:

39. The capacitance of a parallel plate capacitor is inversely proportional to the:

40. The unit of magnetic field intensity is:

41. The magnetic flux density B and magnetic field intensity H are related by:

42. The force between two parallel current-carrying conductors is attractive if the currents are flowing in:

43. The inductance of a solenoid is proportional to the square of the number of turns and proportional to the:

44. The energy stored in an inductor is given by:

45. What is the main characteristic of a perfect dielectric material?

46. The divergence of the electric flux density D is equal to the volume charge density ρv. This is known as:

47. The curl of the magnetic field H is equal to the conduction current density J plus the displacement current density ∂D/∂t. This is:

48. The integral form of Faraday's Law is:

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