AP Physics C: E&M covers 6 units, from Electric Charges & Fields: Gauss's Law to Electromagnetic Induction. Use this hub for unit study guides, topic review, FRQs, cheatsheets, score calculators, practice exams, and exam prep.
AP Physics C: E&M covers 6 units, from Electric Charges & Fields: Gauss's Law to Electromagnetic Induction. Use this hub for unit study guides, topic review, FRQs, cheatsheets, score calculators, practice exams, and exam prep.
Get the big picture: what AP Physics C: E&M covers, how it is scored, and how the units connect.
read the overviewStart with the scoring requirements, then choose the guides that match your current project.
browse guidesOpen the unit you are studying now and review its guides, practice, and key terms.
browse all 6 unitsAP Physics C: E&M covers 6 units, from Electric Charges & Fields: Gauss's Law to Electromagnetic Induction. Use this hub for unit study guides, topic review, FRQs, cheatsheets, score calculators, practice exams, and exam prep.
Use Gauss's law and symmetry to find electric fields of charge distributions
Relate electric potential energy, potential, and field through calculus
Analyze conductors, capacitors, and dielectrics and how charge redistributes
Apply Ohm's law and Kirchhoff's rules to DC and RC circuits
Determine magnetic fields and forces using the Biot-Savart law and Ampere's law
Model electromagnetic induction and analyze LR and LC circuits
The AP Physics C: E&M exam is 3 hours long and split evenly between multiple-choice and free-response. Here is how the sections break down.
| Section | Questions | Time | % of Score |
|---|---|---|---|
| Section I – Multiple Choice | 40 | 80 min | 50% |
| Section II – Free Response | 4 | 100 min | 50% |
Total timed testing time: 180 minutes.
The course is organized into 6 units. The percentages below are the College Board exam weights, so you can see which units carry the most multiple-choice points. Open each unit for its study guide, topic pages, key terms, and practice questions.
Unit 8 of AP Physics C: Electricity and Magnetism builds electrostatics from the ground up: what charge is, how charged objects push and pull on each other through Coulomb's law, and how to describe those interactions with the electric field.
AP Physics C: E&M Unit 9 covers electric potential and electric potential energy, the scalar side of electrostatics.
AP Physics C: E&M Unit 10 is about what happens when charge meets matter.
AP Physics C: E&M Unit 11 covers electric circuits, which is how charge actually moves and delivers energy in real devices.
AP Physics C: E&M Unit 12 covers where magnetic fields come from and what they do to moving charges and currents.
Unit 13 of AP Physics C: Electricity and Magnetism is about electromagnetic induction, the discovery that a changing magnetic flux creates an electric potential difference.
These trends come from real Fiveable practice data, so you can see what students are reviewing, which topics need extra attention, and how written practice can improve over time.
Miss rate is based on high-volume AP Physics C: E&M multiple-choice practice.
Average MCQ accuracy by student practice volume across 285 AP Physics C: E&M students.
Among AP Physics C: E&M FRQ responses that students retried on Fiveable, average scores rose from 10% on the first attempt to 38% on the latest attempt.
practice AP Physics C: E&M FRQs →These guides collect important exam skills, big ideas, essay tasks, and other subject-specific resources.
Build your understanding unit by unit instead of cramming at the end, since each topic feeds the next. Work problems from scratch, set up your reasoning, then check and redo the ones you miss. Treat derivations as a skill: practice deriving fields, potentials, and capacitance rather than just reading results. Because the free-response section is half your score, write full solutions with units, diagrams, and justifications even when the math feels obvious. Use your lab notebooks too, since experimental design and data analysis show up directly on the exam. Short, focused problem sessions every few days will build the multi-step reasoning the exam actually tests.
Week 1: Review Units 8 and 9, practicing Gauss's law derivations and potential calculations
Week 2: Work Unit 10 capacitor and dielectric problems, then start Unit 11 circuits
Week 3: Drill Unit 11 with Kirchhoff's rules and RC circuits using practice questions
Week 4: Cover Units 12 and 13, focusing on Ampere's law, induction, and LR/LC circuits
Week 5: Practice all four FRQ types with full written justifications and timing
Week 6: Take a timed mixed multiple-choice set and review weak topics with unit guides
Use the question types below to plan written-response practice and connect exam guides to timed FRQs. Open an example prompt to practice that question type right away.
| Question | Focus | Points | % of Score | Example prompt |
|---|---|---|---|---|
| FRQ 1 | Mathematical Routines | 10 | 13% | Energy storage in series capacitor circuit |
| FRQ 2 | Translation Between Representations | 12 | 15% | Electric field from infinite line charge in media |
| FRQ 3 | Experimental Design | 10 | 13% | Magnetic permeability determination through graphical analysis |
| FRQ 4 | Qualitative/Quantitative Translation | 8 | 10% | Electric force from semicircular charge distribution |
Find every unit and topic guide in one place.
AP Physics C: E&M covers electric fields, Gauss's law, electric potential, circuits, magnetic fields, induction, and other calculus-based electricity and magnetism topics.
Review one unit at a time, then solve AP-style problems so you practice both the physics concepts and the calculus-based setup. The guides work best when you pair them with active problem work.
Use Fiveable's AP Physics C: E&M FRQ practice for AP-style free-response questions with AI-supported scoring on setup, equations, and reasoning.
Start with the field and potential ideas that power the rest of the course, then move into circuits and magnetism. If you're doing exam review, focus on the problems where you lose points in setup rather than algebra.