Edexcel Certificate Physics Past Papers & Mark Schemes

Calculation questions in Paper 1 frequently require you to rearrange equations before substituting values. Practise triangle method and algebraic rearrangement for all key equations: v = fλ, P = IV, E = QV, F = ma, p = mv, W = Fs. Ensure you can identify the correct equation from a given scenario and convert units correctly (kJ to J, km/h to m/s, kΩ to Ω) before substituting. Electricity circuit questions may involve series and parallel combinations. For series circuits: total resistance = sum of individual resistances; current is constant throughout. For parallel circuits: 1/total R = 1/R₁ + 1/R₂ + ...; voltage across each branch is the same. Practise combining these rules to solve multi-branch circuit problems, particularly when some branches are in series within a parallel arrangement. Nuclear physics questions in Paper 2 require understanding of radioactive decay equations. For alpha decay, the mass number decreases by 4 and the atomic number by 2. For beta-minus decay, the atomic number increases by 1 and the mass number is unchanged. Know the relative ionising power and penetrating power of each type (alpha: most ionising, least penetrating; gamma: least ionising, most penetrating) and the shielding materials required. Half-life calculations may involve multiple half-lives — practise working systematically through successive halving.