New College Oxford Physics Interview
What to expect and how to prepare for New College Physics interviews in 2026
See the packs — start with Dynamics and Fields, £180What to expect and how to prepare for New College Physics interviews in 2026
See the packs — start with Dynamics and Fields, £180New College is one of Oxford's oldest and most distinguished institutions, founded in 1379, and its Physics interviews maintain a tradition of rigorous, problem-led assessment that has shaped the careers of physicists, engineers, and scientists across generations. Physics at Oxford is taught through a combination of lectures and tutorials, and the tutorial system demands students who can engage with unfamiliar problems, reason quantitatively in real time, and think conceptually about physical phenomena rather than simply applying memorised equations. The interview exists to identify whether you can do exactly that. The Dynamics and Fields pack, £180, is the usual starting point for Physics.
The Engineering and Science Admissions Test (ESAT) is your most important pre-interview tool. New College uses ESAT scores to shortlist candidates, and strong performance — demonstrating mathematical fluency, physical intuition, and the ability to apply principles to novel problems — is essential for securing an invitation. Crucially, the skills the ESAT tests are directly aligned with what New College Physics tutors probe at interview: candidates who prepare thoroughly for the ESAT arrive at interview with significantly stronger problem-solving foundations.
Most Oxford Physics applicants have two interviews. New College interviews typically involve one or two tutors and last between 25 and 35 minutes. The format is almost entirely problem-based: you will be given problems to work through in real time, and tutors will watch closely as you do so, prompting when you stall and extending the problem when you make progress.
Problems in New College Physics interviews often span multiple areas of the A-level syllabus — mechanics, electromagnetism, thermodynamics, waves, and modern physics — and frequently require you to apply multiple principles simultaneously. A characteristic New College question might start with a straightforward mechanics problem and evolve into a question about energy conservation, then thermodynamics, as the tutor probes deeper. You should expect the difficulty to escalate as the interview progresses.
The Dynamics and Fields pack, £180
Ten mechanics-and-fields questions, each given in full before any help is offered, a Hints page next if you want a nudge, and the full derivation last. 26 pages in total, with a free Physics sample if you want to see the layout before you commit.
Buy the Physics pack, £180Mathematical fluency matters enormously. Physics interviews at Oxford require you to differentiate, integrate, and manipulate equations confidently and quickly. If you hesitate over basic calculus, tutors will notice. The mathematical skills you have developed in your Maths A-level are prerequisites for the Physics interview, not optional extras.
One example, worked end to end
A list of example questions is easy to give and hard to judge without an answer sitting next to it. Here is one physics problem carried all the way through, in the same shape the packs use: the question on its own, a hint if you want a nudge, and then the complete working — including a first attempt that does not survive.
Question
A spring of natural length L and spring constant k has a mass m attached to one end, oscillating with simple harmonic motion. The spring is then cut exactly in half, and the mass is reattached to one of the two halves. What happens to the period of oscillation, and why?
Hint
Do not reach for T = 2π√(m/k) and stop at the substitution. A spring constant is not a fixed property of “springiness” in the abstract — it depends on how much material is being asked to stretch. Ask what happens to that quantity when there is less spring left to share the same total extension, and keep a second question in reserve: does a dimensional check protect you here, or not?
Full answer
The instinctive first move, under time pressure, is to reason that half the spring must supply half the restoring force for the same extension, so the constant halves to k/2. Substituting into the period formula gives T′ = 2π√(m/(k/2)) = √2 · T — a longer period than before. This is the answer most candidates reach for first, on the reasonable-sounding assumption that less spring means a weaker spring. It does not survive the next question a tutor asks, and New College interviews are built on exactly that kind of follow-up: the earlier questions above show the same pattern, a straightforward setup extended until a first answer has to be defended or dropped.
A shorter spring is stiffer, not softer: the same total stretch is now shared between less material, so each unit length of spring is stretched further. Treat the original spring as two identical half-springs joined end to end, each with its own constant k_half. Springs joined this way combine as 1/k = 1/k_half + 1/k_half = 2/k_half, so k_half = 2k — half the length doubles the constant. Substitute the correct value into the same formula: T′ = 2π√(m/2k) = T/√2 ≈ 0.71T. Cutting the spring in half shortens the period to about seventy percent of the original, the reverse of the first attempt rather than a small correction to it.
The dimensional check the hint raised is worth doing, and worth seeing fail: [T] = √([m]/[k]) works out to seconds whether you substitute k/2 or 2k, because a units check only confirms that a formula has the right shape, not that a particular number belongs in it. Put kilograms over newtons-per-metre, simplify newtons to kg·m/s², and the kilograms and metres cancel to leave seconds squared under the root either way. That is exactly why the wrong substitution in the first attempt is easy to miss under interview pressure: it passes every check except the one that actually matters, which is whether you reasoned about the spring constant correctly in the first place.
A second check, cheaper than the algebra, confirms the direction: split the original spring into N identical pieces in series and each piece has constant Nk, by the same argument, so joining any two of those N pieces back together must return you to k — and it does. Extend the question one step further, as a tutor typically would, and the follow-up arrives quickly: cut the spring into three equal pieces instead of two, and use one of them. The same series relationship gives each third a constant of 3k, so the new period is T/√3, and the pattern generalises to T/√n for a spring divided into n equal pieces with one piece in use. None of that needed new physics, only the same relationship applied a second time under a slightly different assumption — which is closer to what an interview is actually probing than the original question was.
One more extension is worth trying before moving on, because it is the kind of quick cross-check a tutor might ask for: what happens to the same spring-and-mass system on the Moon, where the acceleration due to gravity is roughly a sixth of its value on Earth but the spring itself is unchanged? Nothing does, because neither k nor m depends on g, so T = 2π√(m/k) is the same on the Moon as on Earth. That is worth noticing precisely because it is the opposite of what a simple pendulum does, where the period depends on g directly — two systems that oscillate for different underlying reasons, which is the kind of contrast an interviewer probes for once you have shown you can do the algebra.
None of this appears in the Dynamics and Fields pack in this exact wording — it illustrates the shape the pack’s own ten questions take, not a substitute for working through them. A worked example on a page proves the method exists; it does not prove you can reproduce it cold, with someone watching and asking why, three weeks from now.
Work through ESAT past papers systematically. Every question you find difficult is a signal about a gap in your problem-solving foundations. Do not just find the correct answer — understand why the approach works, how you could have spotted it more quickly, and what variations of the problem might look like. This analytical approach to past papers directly builds interview readiness.
Practise estimating. Fermi estimation questions — “How many piano tuners are there in London?” or “What is the total energy consumed by the UK in a year?” — are common in Oxford Physics interviews and require you to make reasonable assumptions, apply physical reasoning, and arrive at a plausible order-of-magnitude answer. The habit of thinking quantitatively about everyday physical phenomena is something that strong Physics candidates develop over months, not days.
Deepen your conceptual understanding of the areas where A-level tends to be most superficial: quantum mechanics, special relativity, and the physics of materials. Tutors frequently ask candidates to reason about these areas at a conceptual level, and candidates who have read around these topics — through accessible texts like Feynman’s Six Easy Pieces — consistently perform better than those who have stuck strictly to the A-level specification.
For free samples in nine subjects and the full expert packs at £180, see our Oxford Physics interview questions resource.
The six questions above are typical of what New College asks; working through similar problems against a clock, then checking each derivation line by line, is what separates a fluent answer from a hesitant one. The free Physics sample in the Dynamics and Fields pack shows the exact layout before you commit to the £180 pack.
The ESAT is central to the shortlisting process and New College uses ESAT scores as a primary filter before interview invitations are issued. A strong ESAT performance — typically in the upper quartile — significantly increases your chances of being invited. Equally importantly, ESAT preparation directly builds the mathematical and physical problem-solving skills that your interviewers will assess.
Further Mathematics is not formally required, but it is strongly advantageous. Many Oxford Physics applicants do have Further Maths, and those who do arrive with stronger mathematical foundations for both the interview and the course itself. If you are not studying Further Maths, ensure your core Mathematics is fluent and that you are comfortable with calculus, complex numbers, and vectors.
Estimation questions — Fermi problems — are common in Oxford Physics interviews. Tutors ask them to assess your physical intuition and your ability to reason quantitatively from first principles. The “correct” answer is an order-of-magnitude estimate, not an exact value. Practise estimation regularly: how much energy is in a AA battery, how long would it take to fill a swimming pool, what force does atmospheric pressure exert on your skin.
Derive it, or reason about what it should look like from dimensional analysis. Oxford Physics tutors are generally not interested in whether you can recall equations — they want to see whether you understand the physics well enough to reconstruct the relevant relationship from first principles. If you forget the equation for kinetic energy, think about what quantities it must depend on and use dimensional analysis to narrow it down. This kind of reasoning is exactly what the interview is designed to reveal.
Sketch it, then derive it, then tell me what you assumed
The projectile question above is A-level physics until the tutor asks about air resistance, or what changes if the cliff is on the Moon. New College interviews live in that extension, and candidates who learned the standard result rather than the derivation run out of road there.
Reading a derivation and saying one aloud while somebody interrupts it are different skills, and a PDF only tests the first. Working through the Physics pack, £180, against a clock, then defending each assumption out loud to somebody else, is closer to what December actually asks of you.
Most Oxbridge interviews last between 20 and 45 minutes and are conducted by one or two subject tutors at the college you have applied to. The format focuses on academic discussion rather than personal statements — tutors typically give you an unseen problem, passage, or object and ask you to think through it aloud. They are assessing how you reason under pressure and engage with new ideas, not whether you arrive at a 'correct' answer. Preparation should therefore focus on practising structured reasoning and academic argument.
Leading Tuition's contribution here is the Dynamics and Fields pack: ten New College-style Physics questions, each given in full, a Hints page if you want a nudge, then a full derivation, £180 — see the Physics interview questions page for the free sample. A PDF cannot watch you reason and interrupt when you take a shortcut the way a real interviewer does, so treat it as material to work through against a clock and check line by line, not as a stand-in for being questioned live.
Free samples in nine subjects show you the format; the full range is 30 packs across 17 subjects, £180 each.
See the expert packs →Leading Tuition has helped hundreds of students get into Oxford and Cambridge. 91% of our students achieve their desired grades. Rated Excellent on Trustpilot. That is the company's rating, not a rating of this pack.