About

A midterm 1 review site for Stanford's Physics 81 (Electricity & Magnetism), Spring 2026.

Scope

Material covered through lecture-notes chapter 3, i.e. through electrostatics, vector calculus, and conductors. 30 concept pages total.

Sources

• Lecture notes (ph81_2025_26_q3) chapters 1–3 and activities 1–7
• Purcell & Morin, Electricity and Magnetism (3rd ed.), chapters 1–3
• Last year's Learning Assessment 1 (2024-25) for problem-style calibration

Practice problems

Problems on each page are fresh, written to drill that concept. They're modeled on problem-set and LA1 style but aren't lifted verbatim.