How is the AP Physics C: Electricity & Magnetism exam scored?

Two equal sections. Section I is 40 calculus-based multiple-choice questions in 80 minutes, scaled to 50 points (50%). Section II is 4 free-response questions in 100 minutes worth 40 raw points scaled to 50 points (50%). The 100-point composite maps to the 1-5 scale.

What changed in AP Physics C: E&M for 2025?

The exam was redesigned for May 2025. Multiple choice went from 35 questions in 45 minutes (5 choices) to 40 questions in 80 minutes (4 choices). Free response went from 3 questions in 45 minutes to 4 questions in 100 minutes. Prep materials from 2024 or earlier use the old format.

What is the AP Physics C: E&M pass rate in 2025?

In 2025, about 72% of students scored a 3 or higher, with a mean near 3.33. The distribution was 5: 23%, 4: 24%, 3: 25%, 2: 19%, 1: 9%. E&M has one of the highest shares of 5s of any AP exam, but it is a small, self-selected group.

How is E&M different from Physics C: Mechanics?

They are two separate exams with the same calculus-based, 40 MCQ + 4 FRQ format. Mechanics covers motion, forces, energy, momentum, and rotation; E&M covers electric and magnetic fields, circuits, and induction. Many students take Mechanics first, then E&M.

Is there an equation sheet?

Yes. An equation sheet with formulas and physical constants is provided. You still need to know which relationship to use and how to set up the integrals and derivatives.

AP Physics C: E&M Score Calculator 2026

Q: Can I use a calculator on AP Physics C: E&M?

Yes. A scientific or graphing calculator is allowed on both sections, and an equation sheet is provided. Physics C has always allowed calculators because the math is heavier.

Q: What topics are on AP Physics C: E&M?

Electrostatics (including Gauss's law), conductors, capacitors and dielectrics, electric circuits, magnetic fields and forces, and electromagnetism (Faraday's law and induction). It uses vector calculus throughout.

Q: When is the 2026 AP Physics C: E&M exam?

It is given during the May 2026 AP exam window, usually the same afternoon as Physics C: Mechanics. The exam runs 3 hours: 80 minutes of multiple choice and 100 minutes of free response. Check AP Central for the exact date.

📋

Section I: Multiple Choice

40 questions · 4 choices each · 80 minutes · 50% of score · Calculator allowed

/ 40

Scaled: 0.0 / 50 pts

✍️

Section II: Free Response

4 questions · 40 total raw pts · 100 minutes · 50% of score · Calculator allowed

Click each FRQ to expand the per-part rubric. Points follow the 2025 scoring guidelines for the redesigned 4-question format.

Mathematical Routines

MR · 10 pts · ~25 min

0/10 ▼

Derive expressions, solve multi-step problems, use algebra

A(i) Sketch/graph (e.g., momentum vs time)

A(ii) Conservation equation setup

A(iii) Apply equation to problem context

A(iv) Multi-step derivation (relationship identification)

A(v) Correct mass/velocity substitution

A(vi) Final symbolic expression

A(vii) Correct numerical/symbolic answer

B(i) Qualitative claim (increase/decrease/constant)

B(ii) Physics principle justification

B(iii) Reasoning connecting force to momentum

Translation Between Representations

TBR · 12 pts · ~25 min

0/12 ▼

Translate between words, equations, graphs, diagrams, bar charts

A(i) Energy bar chart — correct type of energy

A(ii) Second bar chart — correct energy types

A(iii) Bar heights consistent with conservation

B(i) Conservation of energy setup

B(ii) Equate correct energy forms

B(iii) Correct distance/displacement substitution

B(iv) Correct final expression for unknown

C(i) Sketch total mechanical energy on graph

C(ii) Sketch potential energy — correct trend

C(iii) Correct starting point on graph

D(i) Speed comparison claim

D(ii) Justification using energy graph

Experimental Design & Analysis

LAB · 10 pts · ~25 min

0/10 ▼

Design experiment, describe procedure, analyze data, graph results

A(i) Describe procedure with equipment

A(ii) Method to reduce uncertainty (repeat/multiple)

B(i) Identify quantities to plot for linear graph

B(ii) Relate slope to unknown quantity

C(i) Identify vertical axis quantity

C(ii) Label axis with units and scale

C(iii) Plot data points correctly

C(iv) Draw best-fit line

D(i) Calculate slope from graph

D(ii) Use slope to determine unknown

Short Answer / Paragraph Argument

SA · 8 pts · ~25 min

0/8 ▼

Focused problems, written explanations, justify claims with physics

A(i) Identify physics principle or claim

A(ii) Apply equation or concept

A(iii) Correct substitution or calculation

B(i) Qualitative reasoning / comparison

B(ii) Paragraph justification with evidence

B(iii) Correct use of physics terminology

C(i) Diagram / FBD / graph interpretation

C(ii) Final reasoning or conclusion

1AP Score

No Recommendation

Enter your scores above to see your prediction.

MCQ (50%)

0.0

0/40

FRQ (50%)

0.0

0/40

Total

0.0

/ 100

1 (0-24)2 (25-39)3 (40-53)4 (54-69)5 (70+)

MCQ: (0/40) × 50 = 0.0 | FRQ: (0/40) × 50 = 0.0 | Total: 0.0 / 100

🎯 Likely score range — cutoffs move each year, so we show a band near boundaries

Enter your scores to see your most likely score and how close you are to the next one.

🎯 Target Score Mode

Select a target score to see what you need.

💡 What-If Scenarios

Auto-generated based on your current scores

📊 Topic Confidence Tracker — 5 Areas

Rate your confidence in each topic. Electrostatics and Gauss's law carry the most weight, so weak spots there cost the most points.

Electrostatics (incl. Gauss's Law)~26-34%

Conductors, Capacitors & Dielectrics~14-17%

Electric Circuits~17-23%

Magnetic Fields & Forces~17-23%

Electromagnetism (Induction)~14-20%

🆕 What Changed in 2025 (and Stays for 2026)

AP Physics C: E&M was redesigned for May 2025, mainly to expand both sections. There are more multiple-choice questions with more time, and a fourth free-response question. Here is what changed:

Feature	Old Format (pre-2025)	New Format (2025+)
MCQ Count	35 questions	40 questions
MCQ Choices	5 choices	4 choices only
MCQ Time	45 minutes	80 minutes
FRQ Count	3 questions	4 questions
FRQ Time	45 minutes	100 minutes
Calculator	Allowed	Allowed (no change)
Math	Calculus	Calculus (no change)
2025 Pass Rate	—	72%
2025 Mean	—	3.33

How AP Physics C: E&M Scoring Works

The exam has two equally weighted sections. An equation sheet is provided and a calculator is allowed throughout. The composite below is out of 100 and maps to the 1-5 scale using cutoffs that move slightly each year.

Section	Questions	Time	Weight	Raw → Scaled
I: Multiple Choice	40 Qs (4 choices)	80 min	50%	40 → 50 pts
II-Q1: Mathematical Routines	~25 min	100 min	50%	10 pts
II-Q2: Translation (TBR)	~25 min			12 pts
II-Q3: Experimental Design (LAB)	~25 min			10 pts
II-Q4: Short Answer / Paragraph	~25 min			8 pts

Composite = (MCQ correct / 40) × 50 + (FRQ raw / 40) × 50 = out of 100. Each correct MCQ and each FRQ raw point is worth 1.25 composite points.

Target

~40 / 100

≈ 40% overall

Target

~54 / 100

≈ 54% overall

Target

~70 / 100

≈ 70% overall

Topic Weights on the AP Physics C: E&M Exam

Electrostatics carries the most weight, followed by circuits and magnetism. These ranges are approximate, based on the published course framework.

Electrostatics (incl. Gauss's Law)~26–34%

Conductors, Capacitors & Dielectrics~14–17%

Electric Circuits~17–23%

Magnetic Fields & Forces~17–23%

Electromagnetism (Induction)~14–20%

High PriorityMediumLower Priority

Key Equations Reference

An equation sheet is provided on the exam. Here are formulas you should recognize and know when to apply on the exam.

Coulomb's Law

F = kq₁q₂/r²

Electric Field

E = F/q

Gauss's Law

∮E·dA = Q/ε₀

Potential

V = kq/r

Field from V

E = −dV/dr

Capacitance

C = Q/V

Parallel-Plate C

C = ε₀A/d

Energy in C

U = ½CV²

Current

I = dQ/dt

Ohm's Law

V = IR

RC Time Constant

τ = RC

Power

P = IV

Magnetic Force (charge)

F = qv×B

Force on Wire

F = IL×B

Ampère's Law

∮B·dl = μ₀I

Biot–Savart

dB = (μ₀/4π)(I dl×r̂)/r²

Faraday's Law

ε = −dΦ_B/dt

Inductor Energy

U = ½LI²

2025 AP Physics C: E&M Score Distributions

2025 was the first year of the redesigned exam. The pass rate was about 72% with a mean of 3.33. E&M is a small, self-selected group, which is why it has one of the highest shares of 5s of any AP exam alongside a meaningful tail of 1s.

23%

24%

25%

19%

Because 2025 was the first year of the redesigned format (four FRQs instead of three, and a longer multiple-choice section), year-over-year trend lines reset here. E&M draws a small, strong, self-selected group, so its share of 5s is high while the average raw difficulty stays among the toughest in the AP program.

Source: College Board score distributions, 2025.

Exam Strategies by Section

📋Multiple Choice

Now only 4 choices — easier to eliminate. Draw free-body diagrams for forces problems. Use dimensional analysis. Calculator allowed but most problems are conceptual. Budget ~2 min per question. No penalty for guessing.

🔢Q1: Mathematical Routines

Show ALL derivation steps. Start with a fundamental principle (conservation law). Define variables clearly. Use symbolic math — plug in numbers only at the end. Label final answers. Common topics: momentum, energy, kinematics.

📊Q2: Translation (TBR)

Practice energy bar charts, graphs, and diagrams. Translate between words → equations → graphs. Conservation of energy is a frequent topic. Label graph axes with units. Be consistent between different representations.

🔬Q3: Experimental Design

Name specific equipment. Describe step-by-step procedure. Identify independent/dependent variables. Explain how to reduce uncertainty (repeat trials). Plot linear graph — relate slope to unknown. This is often the most points-rich FRQ.

AP Physics C: E&M vs Physics C: Mechanics

Feature	AP Physics C: E&M	AP Physics C: Mechanics
Math Level	Calculus-based	Calculus-based
Topics	Fields, circuits, magnetism, induction	Motion, forces, energy, rotation
Calculator	Yes	Yes
MCQ	40 Qs, 80 min, 4 choices	40 Qs, 80 min, 4 choices
FRQ	4 Qs, 100 min	4 Qs, 100 min
2025 Pass Rate	72%	73.2%
2025 Mean	3.33	3.30
Usually Taken	After Mechanics	First of the two

Frequently Asked Questions

Two equal sections. 40 calculus-based MCQs (80 min) scale to 50 points and 4 FRQs (100 min, 40 raw points) scale to 50 points. The 100-point composite maps to the 1-5 scale.

The exam was redesigned: multiple choice went from 35 questions in 45 minutes to 40 questions in 80 minutes with 4 choices, and free response went from 3 questions in 45 minutes to 4 questions in 100 minutes. Prep from 2024 or earlier is out of date.

Yes, a scientific or graphing calculator is allowed on both sections, and an equation sheet is provided. Physics C has always allowed calculators.

In 2025, about 72% of students scored a 3 or higher, with a mean of 3.33. The breakdown was 5: 23%, 4: 24%, 3: 25%, 2: 19%, 1: 9%.

Electrostatics and Gauss's law, conductors/capacitors/dielectrics, electric circuits, magnetic fields and forces, and electromagnetism (Faraday's law and induction). It uses vector calculus throughout.

They are separate exams with the same calculus-based, 40 MCQ + 4 FRQ format. Mechanics is motion, forces, energy, and rotation; E&M is fields, circuits, magnetism, and induction. Most students take Mechanics first.

Yes. Formulas and constants are provided, so you do not memorize equations but must know which relationship to use and how to set up the calculus.

During the May 2026 AP exam window, usually the same afternoon as Physics C: Mechanics. The exam runs 3 hours: 80 minutes of multiple choice and 100 minutes of free response.

AP Physics C: E&M Score Calculator CALCULUS

📊 Topic Confidence Tracker — 5 Areas

🆕 What Changed in 2025 (and Stays for 2026)

How AP Physics C: E&M Scoring Works

Topic Weights on the AP Physics C: E&M Exam

Key Equations Reference

2025 AP Physics C: E&M Score Distributions

Exam Strategies by Section

📋Multiple Choice

🔢Q1: Mathematical Routines

📊Q2: Translation (TBR)

🔬Q3: Experimental Design

AP Physics C: E&M vs Physics C: Mechanics

Frequently Asked Questions

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