AP exams, 6 units
AP Physics C: Electricity and Magnetism exam guide
Calculus-based electricity and magnetism across the six units of the revised framework, from Gauss's law to induction.
Follows the fall 2024 course and exam description, from 15 May 2025
Overview
What AP Physics C: Electricity and Magnetism covers.
AP Physics C: Electricity and Magnetism is a calculus-based course covering electrostatics, conductors and capacitors, circuits, magnetic fields, and electromagnetic induction. Vector calculus at the level of Gauss's law and Ampere's law is used throughout, and integration over charge and current distributions is a routine skill rather than an occasional one.
In the revised framework effective fall 2024, the course is organized into six units numbered 8 through 13, continuing the numbering from AP Physics C: Mechanics, which College Board treats as a functional prerequisite. The exam was lengthened to three hours with a longer multiple-choice section and four free-response questions.
Arcade Academy is an independent study workspace. Because the framework and exam were revised recently, treat the official Course and Exam Description and exam page as authoritative for unit organization, published weightings, and current timing, and use the unit pages below to organize problem practice.
At a glance
- Total time
- 3 hours
- Section I
- 42 multiple-choice questions in 1 hour 25 minutes, 50% of the exam score
- Section II
- 4 free-response questions, 50% of the exam score
- Format update
- The multiple-choice count and per-section timing changed beginning with the May 2027 exam; confirm the current numbers on the official exam page
- Delivery
- Hybrid digital: multiple-choice questions are answered and free-response prompts are read in College Board's Bluebook app, and free-response answers are handwritten in a paper booklet
- Calculator
- Permitted on the exam; an equations and reference information sheet is provided
- Prerequisites
- Calculus is used throughout, and College Board treats AP Physics C: Mechanics as a functional prerequisite
- Score scale
- 1 to 5
- Governing body
- College Board
- Who takes it
- High school students who have taken or are taking calculus and mechanics, typically those planning to study engineering or the physical sciences.
Scoring
The multiple-choice and free-response sections each contribute half of a composite score, which College Board converts to the reported 1 to 5 scale using cut points set for that year's exam. This exam is scored separately from AP Physics C: Mechanics, and colleges set their own credit and placement policies for each.
Exam structure
Units
AP Physics C: Electricity and Magnetism covers 6 units. Open one for its topics, published weighting, and section-specific study tips.
Unit 8: Electric Charges, Fields, and Gauss's Law
Unit 8 builds electrostatics from charge through field, culminating in Gauss's law. The distinctive skill is computing the field…
6 topics
Unit 9: Electric Potential
Unit 9 develops the energy view of electrostatics. Electric potential energy and potential are defined by integrating field along…
5 topics
Unit 10: Conductors and Capacitors
Unit 10 covers the behavior of conductors in electrostatic equilibrium and the devices that exploit it. Charge resides on…
5 topics
Unit 11: Electric Circuits
Unit 11 covers steady-state and time-dependent direct-current circuits. Resistors in series and parallel and Kirchhoff's rules…
5 topics
Unit 12: Magnetic Fields
Unit 12 covers magnetic force and the fields that produce it. Forces on moving charges and current-carrying wires lead into the…
5 topics
Unit 13: Electromagnetic Induction
Unit 13 closes the course with changing fields. Magnetic flux, Faraday's law, and Lenz's reasoning connect a changing flux to an…
6 topics
Study strategies
How to work through this exam.
These strategies follow from the exam's own structure. Adapt them to the time you actually have each week.
- Build fluency with the two symmetry laws, Gauss's law and Ampere's law, since choosing the right surface or loop is what makes hard problems tractable.
- Practice setting up integrals over continuous charge and current distributions, because recognizing the setup is worth more exam points than finishing the algebra.
- Work RC, LR, and LC circuits together as one family, since their differential equations and exponential or oscillatory solutions mirror each other.
- Rehearse the right-hand rules on a schedule; they decay quickly and cost very little to maintain.
- Solve symbolically and check limiting cases, which both validates answers and matches how many exam questions are asked.
- Use the official Course and Exam Description for unit organization and published weightings, since the framework was revised recently.
Common questions
AP Physics C: Electricity and Magnetism questions students ask.
How is the AP Physics C: Electricity and Magnetism Exam structured?
The exam runs 3 hours and is split evenly between a multiple-choice section worth 50% of the score and a free-response section of 4 questions worth the other 50%. The multiple-choice count and section timing changed beginning with the May 2027 exam, so confirm current numbers on the official exam page.
Do I need AP Physics C: Mechanics first?
College Board treats mechanics as a functional prerequisite, and the revised framework numbers the Electricity and Magnetism units 8 through 13 to continue from it. The two are separate exams with separate scores, but the energy, force, and calculus habits from mechanics carry over directly.
Which topics do students find most challenging?
College Board does not rank difficulty. Students commonly report that field calculations for continuous distributions, the geometry of magnetic force problems, and induction direction questions demand the most practice. Let your own practice results set priorities.
How is the exam scored?
Both sections contribute equally to a composite score that is converted to the reported 1 to 5 scale using cut points set each year. Credit and placement decisions belong to individual colleges, and a college may grant credit for this exam without granting it for mechanics.
When do students usually begin exam preparation?
Because the course is problem-driven, the common approach is continuous problem practice through the year followed by cumulative timed practice starting roughly two months before the exam, rather than a late content review.
Is Arcade Academy affiliated with College Board?
No. AP® is a registered trademark of College Board, which was not involved in the production of, and does not endorse, this site. Arcade Academy is an independent educational resource.
Before you build the schedule
Exam structures change. Confirm the current format, eligibility, and policies with College Board before you commit to a study plan.
Official exam information opens in a new tabGuide structure last checked against official sources on August 30, 2026.
Markdown version of this guide for citation, offline reading, and language models.
Study AP Physics C: Electricity and Magnetism with a plan you can keep.
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