Past Papers A Level Physics Today

He flipped to 2021 Paper 1, multiple choice. Question 17: A particle moves in a circle with constant angular speed. Which graph shows the variation of its acceleration with time? The obvious answer—a sine wave—was wrong. Centripetal acceleration for uniform circular motion is constant in magnitude, only direction changes. The graph should be a straight line. He’d chosen the sine wave in his first attempt. The mark scheme said: B (straight line). Common distractor: C (sinusoidal). He drew a star next to it.

Daniel turned to the stack of 2024 Paper 4. Question 6(b): A satellite in geostationary orbit experiences a small drag force due to solar wind. Explain, using energy considerations, why its orbital radius decreases. He scribbled an answer: Drag does work against satellite, reduces total energy, so it spirals inward. Two lines. The mark scheme, which he’d printed from the examiner’s report, wanted four distinct points: recognition of negative work, loss of total mechanical energy, conversion to internal energy, and the specific relationship between orbital radius and total energy (E = -GMm/2r). Two marks lost. Again. past papers a level physics

Walking out, Priya grabbed his arm. “Question 4? The one with the diffraction grating and the two wavelengths? Did you use nλ = d sinθ or the small angle approximation?” He flipped to 2021 Paper 1, multiple choice

That was the dark art of A Level Physics. The papers weren’t just testing knowledge. They were testing resilience against a thousand small ambushes: the unit you forgot to convert, the minus sign that vanishes in a derivation, the formula that looks like the right one but has a 2 in the wrong place. Past papers were the map of the minefield. The obvious answer—a sine wave—was wrong

By hour 54, Daniel had developed a system. He’d created a spreadsheet: columns for paper code, question number, marks lost, error type (calculation, conceptual, units, careless), and a final column titled “Examiner’s Actual Thought.” For the geostationary orbit question, he wrote: “We want to see if you know E = -GMm/2r, not just ‘energy decreases.’” For the alpha decay: “We want to see if you check units automatically. 1 MeV = 1.6e-13 J. Memorize it.” For the diffraction experiment: “We want creativity, not a textbook method. Show you understand the physics, not the recipe.”

Priya exhaled. “Thank God. I nearly used the approximation.”

He finished with twenty minutes to spare. He went back through every question, checking each against his mental list of past traps. He changed two answers. He added a missing unit to a final value. He crossed out a sine wave and drew a straight line.