AP Physics C: E&M exam-day guide
AP Physics C: E&M · Prepare for the day ahead.
Your checklist
Photo ID
Bring a current, government-issued photo ID. Acceptable forms and name-matching rules vary by testing site; confirm with the provider which IDs are accepted.
Admission ticket / registration confirmation
Print or download your registration confirmation and know your test center and arrival time. Confirm with the provider whether a printed ticket is required or a digital copy is acceptable.
Approved calculator
Bring a graphing calculator you know well (e.g., TI-84 or similar) with fresh batteries. Check the provider's current calculator policy for allowed models and any prohibited features; confirm with the provider.
Spare batteries
Carry spare AAA/AA batteries matching your calculator. Battery type varies by model, so verify what yours uses.
Pencils and eraser
Bring several sharpened No. 2 pencils and a soft eraser. Confirm with the provider whether mechanical pencils or pens are permitted for the free-response section.
Watch (non-smart)
A simple analog or digital watch helps you pace sections if the room clock is not visible. Smartwatches and phones are typically not allowed at your desk; confirm with the provider.
Reference/table awareness
Know which constants and formulas are provided on the exam's reference sheet versus which you must memorize. Verify the current equation sheet from the provider, since contents can change year to year.
Snack and water
Bring a snack and water for before/after the exam. Whether food is allowed in the testing room or during breaks varies; confirm with the provider.
Layers of clothing
Dress in layers since room temperature is unpredictable.
Review your formula sheet and unit conventions
Do a final pass over key E&M relations (Gauss's law, capacitance, RC circuits, Biot–Savart, Ampere's law, Faraday/Lenz, inductance, Maxwell's equations) and SI unit consistency the night before.
Plan your route and arrival buffer
Confirm the test center location and aim to arrive well before the reporting time. Exact arrival cutoff and late-admission rules vary; confirm with the provider.
Know the section structure
Be clear on the number of multiple-choice and free-response questions, time limits, and whether a calculator is allowed on each section. Confirm the current format with the provider, as it can change.
Plan the day
Do one full timed practice set mixing multiple-choice and free-response. Focus review on your weakest topics (e.g., Gauss's law symmetry cases, RC transients, induction sign conventions). Stop learning brand-new material.
Re-derive core results from memory: field of line/sheet/shell, capacitance of standard geometries, RC time constant, magnetic field of wire/loop/solenoid, motional EMF, energy in inductors and capacitors. Note where you slip.
Light review only: skim your formula sheet and error log. Pack your bag (ID, confirmation, calculator, batteries, pencils, watch, snack, water). Confirm test center address and start time. Get a full night's sleep.
Eat a normal breakfast, arrive early with buffer, and do a 10-minute warm-up of a few easy problems to activate recall. Keep calm and avoid cramming new material.
Read instructions carefully, note the time per section, and jot down any memorized constants or formulas on scratch paper if permitted. Confirm with the provider whether scratch paper is allowed.
Work steadily, skip and flag time-consuming items, and watch unit/direction traps (signs of charge, field direction, current direction). Budget time so you answer every question-there is no penalty for guessing unless the provider states otherwise.
Show setup and reasoning: state the law used, draw a clear diagram, define variables, and carry units. Even partial credit rewards correct method. If stuck, write the governing equation and proceed symbolically.
Ensure every answer is transferred/marked, check for unanswered items, and verify units and significant figures on free-response answers.
Rules to check
Bring and present valid photo ID as required; acceptance criteria vary, so confirm with the provider what forms are allowed.
Follow all test-center conduct rules: no phones, smartwatches, or unauthorized electronics at your desk; keep them stored as directed. Confirm with the provider what is permitted.
Use only an approved calculator and only on sections where it is allowed; confirm the current calculator and section policies with the provider.
Breaks and room exits are typically restricted and monitored; follow proctor instructions and confirm break rules with the provider.
Do not communicate with other test-takers during the exam or attempt to share or reproduce questions; misconduct can void your score.
Scoring: multiple-choice is machine-scored and free-response is human-scored with partial credit for correct method. Whether there is a wrong-answer penalty is provider-specific-confirm with the provider.
Arrive by the reporting time; late admission and makeup policies vary, so confirm with the provider in advance.
Request any accommodations (extended time, separate room, etc.) well before the exam through the provider's approval process; confirm deadlines and documentation requirements with the provider.