About the exam
AP Physics C E&M Exam structure
AP Physics C: Electricity and Magnetism prep with 601 original practice questions aligned to College Board's 2026 hybrid digital exam format, electric fields, Gauss's law, electric potential, capacitors, circuits, magnetic fields, induction, laboratory reasoning, flashcards, and weighted mocks.
Issuer and path
AP Physics C: Electricity and Magnetism Exam Prep is administered through College Board. Check official resources before booking, retesting, or relying on a stale requirement.
Unit 8: Electric Charges, Fields, and Gauss's Law
20 scored + 0 pretest
Electric charge, Coulomb's law, electric fields, field lines, continuous charge distributions, electric flux, Gauss's law, symmetry, and superposition.
Unit 9: Electric Potential
15 scored + 0 pretest
Electric potential, potential difference, potential energy, equipotentials, potential from charge distributions, and electric field from potential.
Unit 10: Conductors and Capacitors
13 scored + 0 pretest
Conductors in electrostatic equilibrium, charge distribution, shielding, capacitance, dielectrics, energy storage, and capacitor combinations.
Unit 11: Electric Circuits
20 scored + 0 pretest
Current, resistance, power, Kirchhoff rules, resistor networks, capacitors in circuits, RC transients, meters, and circuit graphs.
Unit 12: Magnetic Fields and Electromagnetism
15 scored + 0 pretest
Magnetic fields, magnetic force on charges and currents, right-hand rules, Biot-Savart law, Ampere's law, solenoids, and charged-particle motion.
Unit 13: Electromagnetic Induction
15 scored + 0 pretest
Magnetic flux, Faraday's law, Lenz's law, motional emf, induced current, inductance, RL circuits, energy in magnetic fields, and changing-field models.
Before exam day
Confirm your school's AP registration process, Bluebook setup, calculator policy, reference information, sample free-response booklet format, local testing schedule, and whether you are preparing for the 2026 structure or the May 2027 update.
Official Outline Coverage Map
Coverage is mapped to official outline item counts so content depth can be checked without hard-coding a single exam.
| Topic | Official outline items | Your questions | Your flashcards | Confidence |
|---|---|---|---|---|
| Coulomb's Law, Electric Fields, and Superposition | 10 | 62 | 8 | Priority |
| Electric Flux, Gauss's Law, and Symmetry | 10 | 61 | 8 | Priority |
| Electric Potential, Potential Energy, and Equipotentials | 15 | 92 | 8 | Priority |
| Conductors, Electrostatic Equilibrium, and Shielding | 7 | 40 | 8 | Strong |
| Capacitance, Dielectrics, and Energy Storage | 6 | 40 | 8 | Priority |
| Current, Resistance, Kirchhoff Rules, and Power | 10 | 61 | 8 | Priority |
| Capacitors in Circuits, RC Transients, and Circuit Graphs | 10 | 61 | 8 | Strong |
| Magnetic Force, Magnetic Fields, and Charged-Particle Motion | 8 | 46 | 8 | Priority |
| Biot-Savart Law, Ampere's Law, Solenoids, and Field Sources | 7 | 46 | 8 | Priority |
| Magnetic Flux, Faraday's Law, Lenz's Law, and Inductance | 15 | 92 | 8 | Priority |
How to use this guide
How to study for AP Physics C: E&M
Build every answer by defining the charge, field, surface, path, circuit, or flux model; choosing the right integral law or conservation principle; checking signs and units; and justifying claims with evidence.
1. Define the model and geometry
Identify charges, currents, surfaces, paths, fields, potentials, circuit nodes, loops, or flux through an area.
2. Select the law or relationship
Use Coulomb's law, Gauss's law, potential relationships, Kirchhoff rules, Biot-Savart law, Ampere's law, Faraday's law, or energy conservation.
3. Build the mathematical pathway
Derive, integrate, differentiate, compare, estimate, or linearize while tracking signs, units, orientations, and limits.
4. Justify the conclusion
Connect the final expression, graph feature, induced direction, circuit behavior, or experimental evidence to the physical model.
Coulomb's Law, Electric Fields, and Superposition
This topic tests electric charge, Coulomb's law, vector electric fields, field lines, superposition, continuous charge distributions, and force on charges.
Key rules
Rule 1
Electric-field questions require vector addition and a clear source-test charge distinction.
Exam cue: Separate source charge from test charge.
Rule 2
Continuous distributions require choosing charge elements and integrating contributions.
Exam cue: Resolve vector components before adding fields.
Rule 3
Strong answers check direction, symmetry, and limiting behavior.
Exam cue: Use symmetry to cancel components where possible.
Common traps
Adding field magnitudes without directions.
Prevention: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Confusing force on a charge with the field at a point.
Prevention: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Forgetting that negative charges reverse force direction relative to field.
Prevention: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Memory anchors
Electric Charge
Electric charge is the source of electric force and electric field.
Coulomb's Law
Coulomb's law gives the electric force between point charges.
Electric Field
Electric field is force per unit positive test charge.
Field Direction
Electric field direction is the direction a positive test charge would be forced.
Superposition
Superposition adds electric field or force contributions vectorially.
Continuous Charge
A continuous charge distribution is analyzed by integrating small charge elements.
Field Line
Field lines represent direction and relative strength of electric fields.
Test Charge
A test charge should be small enough not to disturb the source distribution.
Next best moves
Quick check-up
Use a short quiz to confirm the rule pattern is actually sticking.
Check-up Questions
Two point charges of +3.0 microC and +3.0 microC are separated by 2.0 m. Using k = 9.0e9 N-m^2/C^2, the magnitude of the force between them is closest to:
The electric field a distance r from a point charge q is given by:
Answer all questions to submit.
Next step personalized recommendations
Open another topic next
Official resources
Verify the details with the official sources
Use these links for eligibility, scheduling, handbook rules, and issuer updates. Our guide helps you study; official sources tell you what the testing partner currently requires.
AP Physics C: Electricity and Magnetism Exam
College Board AP Central page for AP Physics C: Electricity and Magnetism exam mode, date, multiple-choice count, free-response task types, calculator policy, reference information, timing, and scoring weights.
AP Physics C: Electricity and Magnetism Course
AP Central course page with the AP Physics C: Electricity and Magnetism course overview, six units, unit weighting ranges, science practices, laboratory requirement, and CED links.
AP Physics C: Electricity and Magnetism Free-Response Questions
Official AP Central page with released AP Physics C: Electricity and Magnetism free-response questions, scoring guidelines, samples, and scoring distributions.
FAQ
Common AP Physics C E&M questions
Is this official College Board AP Physics C: E&M content?
No. These are original practice questions aligned to College Board's public AP Physics C: Electricity and Magnetism exam format and course framework. They are not copied from secure exam material.
What is on the 2026 AP Physics C: Electricity and Magnetism exam?
College Board lists 40 multiple-choice questions and 4 free-response questions for the 2026 AP Physics C: Electricity and Magnetism exam.
What calculus should I practice for AP Physics C: E&M?
Practice vector fields, line integrals, surface integrals, flux, circulation, derivatives for changing flux or current, and symbolic derivations tied to electric and magnetic models.
What are the AP Physics C: E&M units?
The public course page lists electric charges, fields, and Gauss's law; electric potential; conductors and capacitors; electric circuits; magnetic fields and electromagnetism; and electromagnetic induction.
What about the 2027 AP Physics C: E&M update?
College Board says 2026-27 clarifications will address course conventions and that multiple-choice counts and timing will update starting with the May 2027 exam. This page is aligned to 2026 public guidance.