Physics 9702 · AS & A Level · Physical quantities

Physical quantities — practice question

An up quark inside a hadron is converted into a down quark. The elementary charge is $e$. What is the magnitude of the change in the charge of the hadron?

  • A$\frac{1}{3}e$
  • B$\frac{2}{3}e$
  • C$e$
  • Dzero

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