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Physics (AS & A Level) · Feb / March 2023 · Paper 12 · Question 40

9702Fundamental particles

A top quark has a charge of +\frac{2}{3}e, where e is the elementary charge. What is the charge of an anti top quark?

  1. A-\frac{2}{3}e
  2. B-\frac{1}{3}e
  3. C+\frac{1}{3}e
  4. D+\frac{2}{3}e

As printed in the paper

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Correct answer: A. -\frac{2}{3}e

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