In a nuclear reactor, the rate of fission must stay constant.
Which condition keeps the rate of fission constant?
On average, one neutron from each fission causes one further fission
On average, every neutron from each fission causes a further fission
On average, no neutrons from any fission cause a further fission
On average, two neutrons from each fission cause further fissions
48 exam-style questions on OCR GCSE Physics 6.2 Uses and hazards, covering 6.2.1 Contamination and irradiation, 6.2.2 Half-life and radiation hazards, 6.2.3 Medical uses of nuclear radiation, 6.2.4 Nuclear fission and chain reactions, and 6.2.5 Nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.