A lab technician needs to handle a radioactive source that emits beta (β\betaβ) particles.
Which action will not reduce the radiation dose received by the technician?
placing a sheet of aluminum between the source and the technician
dissolving the radioactive material in a solvent to chemically stabilize it
using long tongs to maximize the distance from the source
minimizing the total time spent in the vicinity of the source
42 exam-style questions on CIE IGCSE Physics 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.