Which statement gives two safety precautions to take when a person is working with a radioactive source to minimize their exposure to ionising radiation?
decrease the thickness of shielding used and decrease the distance between the person and the source
decrease the thickness of shielding used and increase the distance between the person and the source
increase the thickness of shielding used and decrease the distance between the person and the source
increase the thickness of shielding used and increase the distance between the person and the source
484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 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.