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Physics (AS & A Level) · Feb / March 2025 · Paper 12 · Question 39

9702Fundamental particles

What is the change to the quark composition of a nucleus that takes place during β+ decay?

  1. Adown to antiup
  2. Bdown to up
  3. Cup to antidown
  4. Dup to down

As printed in the paper

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Correct answer: D. up to down

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