GATE EE 2027 · SUBJECT 03 / 10

Electromagnetic Fields: Syllabus, Topics & Reference Books

Electric and magnetic fields, potential, capacitance, induction and magnetic circuits.

Electromagnetic Fields syllabus topics

The following topic groups come from the syllabus content included in this study hub. Consult the official GATE 2027 website for examination updates.

  1. Coulomb's Law, Electric Field Intensity, Electric Flux Density, Gauss's Law, Divergence,
  2. Electric field and potential due to point, line, plane and spherical charge distributions,
  3. Effect of dielectric medium,
  4. Capacitance of simple configurations,
  5. Biot‐Savart’s law, Ampere’s law, Curl,
  6. Faraday’s law, Lorentz force, Inductance,
  7. Magnetomotive force, Reluctance, Magnetic circuits,
  8. Self and Mutual inductance of simple configurations.

How to prepare this subject

  1. Check topic coverage. Work through the groups above and mark unfamiliar concepts.
  2. Learn and practise. Study one relevant reference book, then solve worked examples without looking at the solutions.
  3. Apply concepts. Use GATE EE previous-year questions to assess where you need additional practice.
  4. Revise and test. Create a short formula or concept sheet and reattempt questions you initially missed.

Recommended reference books

These are textbook suggestions for studying this subject, not a mandatory purchase list.

  • Engineering Electromagnetics — W. H. Hayt & J. A. Buck
  • Elements of Electromagnetics — M. N. O. Sadiku

Free resources for practice

Use the downloadable question-paper collection and year-wise weightage report as supporting study materials.

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STEP-BY-STEP LEARNING

Capacitance and electric field in a coaxial cable

Apply Gauss’s law to a cylindrical geometry and connect electric-field strength with capacitance.

Key learning goal: Derive the electric-field expression for a coaxial geometry and calculate capacitance per metre from material properties.

Read the detailed worked example and self-check question →

Quick concept check: Keeping the same cable and dielectric, what happens to capacitance per metre if b becomes 10 mm?

Check the answer

C′ becomes 2πε/ln(10) ≈ 60.4 pF/m. Increasing the separation reduces the capacitance.

Common pitfalls: Using a spherical Gauss surface for a cylindrical cable. Confusing the radius of the outer conductor with the thickness of the dielectric.