STUDY GUIDE · GKU 3
Electromagnetics study guide (Electrical Engineering)
Electromagnetics is the theory behind every wire, antenna and microwave circuit. It begins with charges at rest: Coulomb's law, the electric field, Gauss's law and potential. It continues with charges in steady motion: the magnetic field of a current, Ampere's law and the force on a current-carrying conductor. Then come the two laws that tie the fields together — Faraday's law of induction and Maxwell's displacement current — which predict that an electromagnetic disturbance travels as a wave at a speed set by the medium. The last part turns the wave theory into engineering: transmission lines, characteristic impedance, reflection, standing waves and matching. Every section opens with a quick-revision card, and the worked examples run from easy to exam level.
Structured by the official ETEC subject standard for this topic: every listed topic and learning outcome, with formulas, figures and worked examples. The full sections are available to members in the app.
SKU 3.1 · Electromagnetics
Electrostatics and magnetostatics
Coulomb's law, the electric field and potential, Gauss's law, capacitance, and the magnetic field of currents with Ampere's law.
Electrodynamics and electromagnetic waves
Faraday's law, displacement current, Maxwell's equations, and the wave speed and intrinsic impedance that follow from them.
High-frequency transmission lines
Characteristic impedance, reflection coefficient, VSWR, wavelength, quarter-wave matching and the effect of a mismatched load.