Which apparatus is required to measure the count rate of radiation emitted from a specific radioactive sample?
a detector and a counter only
a detector, a counter, and the radioactive sample
a detector and the radioactive sample only
a counter and the radioactive sample only
44 exam-style questions on CIE IGCSE Physics 5.2.1 Background radiation and measuring count rate. Each one has a worked solution and a mark scheme showing where the marks go.