SC134 · Physics for Engineers II

A knowledge wiki for the electromagnetism half of SC134 — Thammasat University, semester 2. From two rubbed amber rods to Maxwell's equations and light, in fourteen lectures. (Optics and modern physics follow the midterm with the second-half instructors.)

The course in one paragraph

Electromagnetism is one long unification. Charge creates fields; Gauss's law organizes them; potential makes them computable; capacitors store them and circuits put them to work. Then the twist: moving charge makes magnetic fields (Biot–Savart, Ampère), and changing magnetic fields make electric fields back (Faraday). Close the loop with Maxwell's displacement current and the equations sing: electromagnetic waves, moving at exactly the measured speed of light.

Start here

• Lecture timeline — the course in teaching order, Lec 1 → 14
• Concept graph — what depends on what
• E&M field explorer — drag charges, see fields
• RC/RLC circuit lab — time constants and resonance, live
• Biot–Savart field builder — coil fields, computed and checked
• Worked examples — choosing a Gaussian surface; designing a Helmholtz pair
• Quizzes · Glossary

How to study

E&M is cumulative like nothing else in first-year physics: Gauss needs flux, potential needs field, circuits need potential, induction needs flux again. If a late topic feels hard, the concept graph will point at the early link that needs repair. The prequel course is SC133 mechanics; the field mathematics returns with full rigor in PHY621.