Overview
Securing an A* in Cambridge A-Level Physics is not about some innate genius, but about adopting the mindset and methods of a professional. It's achieved by combining complete syllabus knowledge with a meticulous, error-free exam technique to convert what you know into the maximum possible marks. The difference between a high A and an A* is often found in the small, avoidable errors that accumulate over four exam papers.
Master the Marking Rubric
Your first step is to understand exactly how you are being marked. In the structured papers (Paper 2 and Paper 4), most calculation questions are awarded points for the correct formula, substitution, final answer, and unit. Missing any one of these, even if your final answer is correct, means losing a mark. Forgetting a unit or using incorrect significant figures across a whole paper can easily cost you 5-10% of the total marks. Study the official mark schemes available on our [9702 marking page](/subjects/9702) to see this in action; internalise what examiners are looking for on every single line of your working.
Plug Every Knowledge Gap
For Cambridge Cambridge past paper revision, top candidates rarely have a topic they are hoping to avoid. The examiners are entitled to set questions on any point from the entire AS and A2 syllabus, and they often combine topics in unexpected ways. You must systematically work through the syllabus and ensure you have a solid understanding of every single learning objective. Don't just read the textbook; use active recall methods and solve problems for each topic. If you find a weak area, like electromagnetism or quantum physics, you must confront it directly until it becomes a strength. Our [free 9702 course](/courses/9702) is structured around the syllabus to help you cover all bases methodically.
Eliminate Avoidable Errors
For Cambridge Cambridge past paper revision, the most common source of lost marks for A-grade candidates is not a lack of physics knowledge, but simple mistakes made under pressure. These include misreading the command word (e.g., writing a description when an explanation is required), algebraic slips in your working, calculator input errors, and dropping units. To combat this, develop a system of double-checking. After writing an answer, re-read the question to ensure you have answered what was asked. Circle the command word and the number of marks available. For calculations, quickly check your working for obvious errors and ask yourself if the answer is a sensible order of magnitude.
Practise Under Strict Timed Conditions
Doing past papers is essential, but *how* you do them is what makes the difference. Simply working through questions with your notes open is not effective practice for an A*. You must simulate the exam environment perfectly: set a timer for the exact duration of the paper, put your notes away, and work through it from start to finish. This is the only way to build the mental stamina required, identify if your pacing is correct, and expose the errors you make when under pressure. It trains you to perform at your peak when it actually matters.
Mark Your Work Brutally
Once the timer goes off, your work is not finished. The most crucial part of the process is to take the official Cambridge mark scheme and grade your own paper. You must be ruthless. Do not give yourself the benefit of the doubt. If your answer doesn't match the wording or values in the mark scheme, you don't get the mark. If you forgot the unit for your final answer, you lose the mark. This process is the fastest way to find the gap between your current performance and the A* standard. You can find a huge library of exam materials on our [9702 past papers page](/past-papers/9702) to get started, and use our guide to [mark a paper](/mark) effectively.
Frequently asked questions
There is no magic number. Quality is far more important than quantity. A student who completes five past papers under timed conditions, marks them brutally, and creates a detailed error log to learn from their mistakes will improve more than a student who casually completes twenty papers. Aim to complete and analyse all available papers from the last 3-5 years.
How many past papers should I do to get an A*?
What is the real difference between an A and an A* candidate?
Consistency. An A-grade candidate knows the physics but may lose marks to careless errors, inconsistent working, or poor time management. An A* candidate has developed a robust system to minimise these errors. They apply meticulous technique to every question, ensuring they secure every 'easy' mark and giving themselves the best possible chance on the harder questions.
I always run out of time on Paper 4. What can I do?
This is a common issue and is solved through practice. First, ensure you are not writing too much for the number of marks available; a two-mark question rarely needs a five-sentence answer. Second, use timed past papers to identify which topics slow you down. Practise those specific question types until you can answer them more fluently. Finally, don't be afraid to skip a very hard question and come back to it at the end.
My practical skills (Paper 3/5) are weak. How can I improve?
Practical papers test a specific set of skills, not just theoretical knowledge. For Paper 5, focus on the structure of the answers. Learn the key phrases for evaluating procedures and handling uncertainties. Practise writing out full methods for imaginary experiments. For Paper 3, mastering the use of equipment and understanding how to calculate and state uncertainties is key. Again, mark schemes are your best guide to what's required.