Conservation laws in particle interactions Quiz
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5 questions, one answer each
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1. Which particle is emitted along with the positron in beta-plus decay?
- A. electron antineutrino
- B. electron neutrino
- C. muon neutrino
- D. electron
2. In the interaction π⁻ + p → K⁰ + Λ⁰, what is the total strangeness after the interaction, given K⁰ is +1 and Λ⁰ is −1?
- A. −2
- B. −1
- C. +2
- D. 0
3. Which interaction violates conservation of lepton number?
- A. n → p + e⁻ +
- B. p → n + e⁺ +
- C. μ⁻ → e⁻ + γ
- D. π⁻ → μ⁻ +
4. A proton is p = uud. Which quark change turns a proton into a neutron?
- A. up → down
- B. down → up
- C. up → strange
- D. strange → down
5. The electrons in beta-minus decay have a range of energies. What does this show?
- A. The nucleus has many energy levels
- B. A third particle shares the energy and momentum
- C. Momentum is not conserved
- D. Charge is not conserved