IB Physics Paper 1 is manageable if you control three things: conceptual accuracy, time, and decision-making under pressure. You do not need to solve every question elegantly. You need to collect accessible marks, eliminate implausible options, avoid preventable mistakes, and move on before one difficult problem damages the rest of your paper.
Under the course first assessed in 2025, Paper 1 contains Paper 1A multiple-choice questions and Paper 1B data-based questions. This guide explains the current format, time allocation, elimination methods, and revision strategies.
Understand the current IB Physics Paper 1 format
Paper 1 accounts for 36% of the final subject grade at both SL and HL. According to the official IB Physics subject brief, SL students receive 1 hour 30 minutes and HL students receive 2 hours.
| Level | Paper 1A | Paper 1B | Total time | Total marks |
|---|---|---|---|---|
| SL | 25 multiple-choice questions, 25 marks | Data-based questions, 20 marks | 90 minutes | 45 |
| HL | 40 multiple-choice questions, 40 marks | Data-based questions, 20 marks | 120 minutes | 60 |
Calculators are permitted, and students have access to a clean physics data booklet. The official IB Physics specimen papers demonstrate the format and expected difficulty.
There is no deduction for an incorrect multiple-choice answer, so every Paper 1A question should have an answer. You also do not separately pass or fail Paper 1. Its marks contribute to your overall subject result, with grade boundaries varying between examination sessions.
Use a realistic time allocation
The IB provides a shared time allowance for Papers 1A and 1B. It does not prescribe when to leave Paper 1A, so you need a personal schedule tested through practice.
| Level | Paper 1A target | Paper 1B target | Final review |
|---|---|---|---|
| SL | 45-50 minutes | 35-40 minutes | About 5 minutes |
| HL | 65-70 minutes | 40-45 minutes | 5-10 minutes |
These are recommendations, not official limits. Establish a firm Paper 1A stopping point so that Paper 1B is not sacrificed.
Use a three-pass system:
- Answer questions whose method is immediately clear.
- Return to questions requiring longer calculations or comparisons.
- Make an educated choice for every remaining question and check the answer sheet.
If you make no meaningful progress after roughly 60-90 seconds, eliminate what you can, choose the best remaining option, and continue. One mark is rarely worth several minutes.
Eliminate options before calculating
Multiple-choice success often depends on proving that alternatives cannot be correct.
Check units and dimensions
If the required quantity is energy, the answer must have units equivalent to joules. An option in watts represents power and can be removed. Dimensional checking also exposes formulas that combine quantities incorrectly.
Estimate the magnitude
Predict the order of magnitude before using your calculator. If a calculation involving a person’s kinetic energy produces , the result is physically unreasonable. Estimation catches incorrect prefixes, powers of ten, and calculator entries.
Test signs and directions
Ask whether the quantity should be positive, negative, increasing, or decreasing. For vectors, sketch a diagram and define a positive direction. This prevents distractors based on reversed force, acceleration, current, or field direction from appearing plausible.
Use proportional reasoning
For , doubling speed while keeping mass constant makes the kinetic energy four times larger. Recognizing the squared relationship is faster than substituting arbitrary values.
Test limiting cases
Consider what happens when a variable becomes zero, very large, or very small. An expression may fail immediately under an obvious limit, especially when two options differ only by whether a variable appears in the numerator or denominator.
Read precisely and use your calculator carefully
Underline qualifiers such as not, except, constant, initial, and magnitude. Distractors are often valid scientific statements that do not answer the question asked.
Try to predict the answer before studying every option. For graph questions, decide whether you expect a straight line, inverse curve, or positive or negative gradient. For statement-combination questions, judge each statement independently as true or false.
Write a symbolic setup before entering numbers into your calculator, particularly when brackets, angles, or scientific notation are involved. Check the resulting sign, magnitude, and unit.
Practise locating equations in the booklet before the examination. The RevisionDojo Physics data booklet resource supports familiarization, but you should also practise with the clean booklet format authorized for your examination.
Protect the Paper 1B marks
Paper 1B tests data handling rather than multiple-choice technique. It may assess graph interpretation, units, uncertainties, gradients, intercepts, and conclusions supported by evidence.
Before calculating, check:
- Axis labels, scale factors, and units
- Table headings and uncertainty information
- Whether variables are raw or transformed
- The command term and available marks
For a gradient, use a large triangle on the best-fit line rather than two neighbouring plotted points. When comparing results, provide numerical evidence instead of stating that values are merely “close.” Identify whether the question requires absolute, fractional, or percentage uncertainty.
Revise through diagnosis, not repetition
Begin with topic-based questions, then progress to mixed timed sets and complete papers. The IB Physics Questionbank supports targeted practice, while Physics flashcards reinforce definitions and relationships.
Classify every wrong or uncertain answer:
- Knowledge gap: You did not know the principle.
- Model-selection error: You chose the wrong equation or law.
- Mathematical error: Algebra, trigonometry, or calculator use failed.
- Misread: You missed a qualifier, unit, scale, or requested quantity.
- Timing error: You stayed too long or guessed prematurely.
Write one corrective rule for each mistake, such as “convert centimetres to metres before substitution.” The Paper 1A MCQ guide and broader IB Physics exam tips provide structures for timed review.
Avoid leaving responses blank, trusting calculator output without checking it, confusing gradient with a coordinate ratio, ignoring prefixes, or using scalar methods for vector problems. Use current-syllabus material first. Older questions can still test useful physics, but may not reproduce the present structure. The IB Physics last-minute revision guide can help prioritize suitable practice.
Conclusion
To avoid a weak IB Physics Paper 1 result, answer every multiple-choice question, impose a stopping point for Paper 1A, eliminate options through units and physical reasoning, and preserve enough time for Paper 1B. Review the causes of mistakes rather than simply counting completed questions.
RevisionDojo can support this process through its Physics Questionbank, Flashcards, data booklet practice, and Jojo AI explanations. Repair individual weaknesses first, then use mixed sets and Mock Exams once your methods are reliable.