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aqa a level physics paper 1 Questions And Answers 2025/2026
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What is meant by work function (2) - correct AnswMinimum energy required by an electron to escape from (1) a metal surface (1) What is meant by ionisation energy? (2) - correct AnswMinimum energy required to remove an electron from an atom (1) from the ground state (1) Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - correct AnswEnergy of a photon is fixed/constant (1) Energy is required for electrons to overcome work function ø (1) Electrons deeper into/below the surface of the metal require more energy to overcome work function and therefore have less KE(1) Maximum KE = Energy of photon - work function ø (1)
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