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Physics (AS & A Level) · Oct / Nov 2025 · Paper 12 · Question 38

9702Fundamental particles

An up quark in a hadron changes to a down quark. The elementary charge is e. What is the magnitude of the change in the charge of the hadron?

  1. A\frac{1}{3}e
  2. B\frac{2}{3}e
  3. Ce
  4. Dzero

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Correct answer: C. e

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