During the beta-plus (β+\beta^+β+) decay of a nucleus, an up quark transforms into a down quark. One of the leptons produced in this interaction has a lepton number of -1 and is deflected when travelling through a magnetic field. Which lepton is this?
electron\text{electron}electron
electron neutrino\text{electron neutrino}electron neutrino
positron\text{positron}positron
electron antineutrino\text{electron antineutrino}electron antineutrino
90 exam-style questions on OCR A A Level Physics Nuclear and particle physics, covering The nuclear atom, Fundamental particles, Radioactivity, and Nuclear fission and fusion. Each one has a worked solution and a mark scheme showing where the marks go.