Are these Electromagnetic Theory handwritten notes free?

Yes. Fill in the short form on this page and the PDF downloads right away. There is no fee for the notes.

Are these official university notes?

No. These are original Uncodemy revision notes for Electromagnetic Theory. They are not issued or approved by AKTU or any other university, and they are not past papers.

Which syllabus do they follow?

They follow the common B.Tech syllabus for Electromagnetic Theory used by most Indian universities, including AKTU and colleges on the AICTE model curriculum. Unit order and depth differ, so match the notes with your own university syllabus.

Is this the same as Electromagnetic Field Theory?

Yes. Many universities call the subject Electromagnetic Field Theory or Electromagnetic Waves. The core topics, from electrostatics to waveguides, are the same.

Do the notes include transmission lines?

Yes. There is a full unit on transmission lines, covering input impedance, reflection coefficient, VSWR, special loads and matching.

Electromagnetic Theory Handwritten Notes PDF

Key takeaways

Seven units, from vector calculus to rectangular waveguides.
Gauss's law, boundary conditions and capacitance of common shapes are summarised.
Maxwell's equations are given in point and integral form, with displacement current.
Plane waves, skin depth, Poynting vector, transmission lines and VSWR are worked through.
Original Uncodemy revision notes, not official university notes. Check your own syllabus.

About these handwritten notes

These Electromagnetic Theory notes are original Uncodemy revision notes, written in a clean handwritten style so they are quick to read before an exam. They follow the common B.Tech syllabus for Electromagnetic Theory (B.Tech ECE and EEE, and GATE EC basics). They are not official university notes and not copied from any textbook or past paper.

Topic order, unit numbers and depth vary between universities, so first place each unit below against your own university syllabus. If your syllabus has a topic that is missing here, add it in the margin from your class notes or textbook. Use these notes for revision after you have studied the topic once in class, not as your only study material. They are short on purpose: the aim is to help you recall the main ideas, formulas and diagrams quickly, so that your exam time goes into writing good answers.

What's inside the Electromagnetic Theory notes

The notes start with the maths you need and then build from static fields to waves. Each unit has formula boxes, standard results and a worked example.

Unit 1: Vector Analysis. Gradient, divergence and curl, the divergence and Stokes' theorems, and Cartesian, cylindrical and spherical coordinates.
Unit 2: Electrostatics. Coulomb's law, Gauss's law, potential, capacitance of common shapes and boundary conditions at dielectric and conductor surfaces.
Unit 3: Magnetostatics. Biot-Savart law, Ampere's law, magnetic flux density, vector potential and inductance.
Unit 4: Maxwell's Equations. Faraday's law, displacement current and all four equations in point and integral form.
Unit 5: Uniform Plane Waves. Wave equation, propagation in lossless and lossy media, skin depth, Poynting vector, polarisation and reflection at normal incidence.
Unit 6: Transmission Lines. Line parameters, input impedance, reflection coefficient, VSWR, special lengths and loads, and matching.
Unit 7: Waveguides. TE and TM modes in rectangular guides, cut-off frequency, guide wavelength and wave impedance.

The last page of the PDF lists the most asked practice questions for the whole subject, so you can test yourself after finishing all the units.

Formulas and solved examples in the PDF

Formula boxes cover the divergence and Stokes' theorems, Maxwell's equations, α, β and η for a lossy medium, skin depth, Zin of a line, Γ and VSWR, and the TE10 cut-off frequency. Solved examples include skin depth, wave speed and intrinsic impedance in a dielectric with εr = 4, a mismatched line, and the TE10 cut-off of an X-band guide.

How to revise Electromagnetic Theory with handwritten notes

Handwritten-style notes work best when you read actively. Keep a pen and a rough notebook beside you, cover the formula or diagram, and try to write it yourself before you look.

Write the four Maxwell equations in both forms on one card and say what each one means in words.
Make a table of standard values: free-space impedance of about 377 Ω, the speed of light and the TE10 cut-off formula.
For boundary conditions, draw one dielectric-dielectric and one dielectric-conductor sketch and mark the tangential and normal components.
For transmission lines, practise the quarter-wave, half-wave, short and open cases until you can write Zin without thinking.

In the last week, read only the formula boxes and exam tips, and solve one numerical or long question per unit from memory. If you study with friends, ask each other to explain one diagram or derivation aloud. Explaining a topic is the fastest way to find the gaps in it.

A short revision plan

If your exam is about a week away, this plan covers every unit in the PDF once and leaves time for practice. Stretch it over two weeks if you are starting from scratch.

Day 1: Vector Analysis, Electrostatics.
Day 2: Magnetostatics, Maxwell's Equations.
Day 3: Uniform Plane Waves, Transmission Lines.
Day 4: Waveguides.
Day 5: Solve the practice questions in the exam focus section below, one per unit, without the notes.
Day 6: Read only the formula boxes and exam tips, redo the numericals you got wrong, and sleep early.

Common mistakes to avoid

Using the wrong unit vector or scale factor in cylindrical and spherical coordinates.
Forgetting that tangential E is zero at a perfect conductor while normal D equals the surface charge.
Using the lossless formulas for a good conductor. Check the loss tangent first.
Mixing up the reflection coefficient Γ and VSWR. VSWR = (1 + |Γ|)/(1 - |Γ|).

How Electromagnetic Theory links to other subjects

Electromagnetic Theory uses vector calculus from Engineering Mathematics. It is the base for Antennas and Wave Propagation, Microwave Engineering and optical communication, and parts of it are reused in Electrical Machines and Power Systems.

Exam focus: high-weightage topics

University papers usually give the most weight to Gauss's law applications, boundary conditions, Maxwell's equations and displacement current, plane waves in lossy media, the Poynting theorem and transmission line impedance and VSWR. Waveguide cut-off is a common short numerical.

Typical long and numerical questions to practise:

Use Gauss's law to find E for a line charge and a sphere of charge.
Write boundary conditions for E and H at a dielectric and a conductor surface.
Write Maxwell's equations in point and integral form and explain displacement current.
Derive the wave equation and find α, β and η for a lossy medium.
Derive the input impedance of a transmission line and find Γ and VSWR.
Find the cut-off frequency, guide wavelength and wave impedance of a rectangular waveguide.

When you write a long answer, start with a one-line definition, draw the diagram or circuit, write the derivation in clear steps and end with the final result and its unit. For numericals, write the formula first, then substitute, so you can still earn step marks if the arithmetic slips.

These are practice questions based on common syllabus topics. They are not verified past papers, and we do not claim any question will appear in your exam. For real previous papers, use your university's official archive.

Who these notes are for

These notes are for B.Tech ECE and EEE students preparing for their Electromagnetic Theory or Electromagnetic Field Theory semester exam, and for students revising GATE EC basics such as transmission lines, waveguide cut-off and plane-wave parameters. Students who find this subject abstract can use the notes as a short map before reading the textbook chapters.

Download Electromagnetic Theory Handwritten Notes PDF