A beam of particles travels within a uniform magnetic field. In which of the following situations does the magnetic field exert a non-zero force on the particles?
A beam of protons moving parallel to the magnetic field lines
A beam of neutrons moving perpendicularly to the magnetic field lines
A beam of alpha (α\alphaα) particles moving at an angle of 45∘45^\circ45∘ to the magnetic field lines
A beam of stationary electrons placed inside the magnetic field
19 exam-style questions on CIE IGCSE Physics 4.5.4a Force on a current-carrying conductor. Each one has a worked solution and a mark scheme showing where the marks go.