AQA A-level Physics - Particles and interactions

Which row identifies the exchange particle Q and the quark structure of particle R?

• Q: W^- and R: uuu

• Q: W⁺ and R: dud

• Q: W⁺ and R: uuu

• Q: W^- and R: dud

The decay of a neutral kaon K⁰ is given by the equation:

K⁰ → X + Y + v̅_e

What are X and Y?

• e⁺ and e^–

• μ⁺ and e^–

• π⁺ and e^–

• π^– and e⁺

Which diagram represents the process of beta-plus decay?

• A

• B

• C

• D

Which of the following is not true?

• Each meson consists of a single quark and a single anti-quark

• Each baryon consists of three quarks

• The magnitude of the charge on every quark is 1/3

• A particle consisting of a single quark has not been observed

Which of the following is not made of quarks?

• kaon

• muon

• neutron

• pion

What is the quark structure for an anti-proton?

• 
• 
• 
• 

Which equation shows the process of annihilation?

• π⁻ + π → γ

• 
• β⁻ + p → γ

• γ + γ → β⁺ + β⁻

Electron capture can be represented by the following equation.

p + e^– → X + Y

Which two particles represent X and Y?

• p and K^–

• e^– and e⁺

• n and V_e

• n and π⁰

What of the following is a hadron of zero charge?

• neutrino

• photon

• proton

• neutron

Which statement concerning the forces between particles is incorrect?

• Leptons experience the weak interaction.

• Leptons experience the strong interaction.

• Hadrons experience the weak interaction.

• Hadrons experience the strong interaction.