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

1. 1. Which law states that the total electric flux through any closed surface is equal to the total charge enclosed within that surface?

   • A. Faraday's Law
   • B. Ampere's Law
   • C. Gauss's Law for Electric Fields
   • D. Biot-Savart Law

2. 2. The unit of electric field intensity is:

   • A. Volts
   • B. Amperes
   • C. Volts/meter
   • D. Coulombs

3. 3. The electric potential at a point due to a point charge is inversely proportional to the:

   • A. Square of the distance
   • B. Distance
   • C. Cube of the distance
   • D. Square root of the distance

4. 4. Permittivity is a measure of a material's ability to:

   • A. Conduct electricity
   • B. Store electric energy
   • C. Conduct magnetic flux
   • D. Resist electric current

5. 5. What is the force between two point charges given by?

   • A. Faraday's Law
   • B. Ampere's Law
   • C. Coulomb's Law
   • D. Gauss's Law

6. 6. The electric field inside a conductor in electrostatic equilibrium is:

   • A. Zero
   • B. Non-zero and constant
   • C. Varies linearly
   • D. Varies exponentially

7. 7. The boundary condition for the tangential component of the electric field at an interface between two perfect dielectrics is that it is:

   • A. Discontinuous
   • B. Continuous
   • C. Zero
   • D. Infinite

8. 8. The curl of the electric field (∇ × E) in a static electric field is always:

   • A. Zero
   • B. Non-zero
   • C. Positive
   • D. Negative

9. 9. Which of the following is a unit of magnetic flux density?

   • A. Weber
   • B. Henry
   • C. Tesla
   • D. Ampere

10. 10. Ampere's Law relates the line integral of the magnetic field H around a closed path to the:

    • A. Total electric flux
    • B. Total magnetic flux
    • C. Total current enclosed
    • D. Total charge enclosed

11. 11. The Biot-Savart Law is used to calculate the magnetic field due to:

    • A. Point charges
    • B. Current elements
    • C. Electric fields
    • D. Magnetic poles

12. 12. Permeability is a measure of a material's ability to:

    • A. Store electric energy
    • B. Conduct electricity
    • C. Support the formation of a magnetic field
    • D. Resist the flow of current