Physics 5054 · O Level

Detection of radioactivity

2 practice questions on Detection of radioactivity, with worked solutions and instant marking.

Thin aluminium foil is used for cooking. The diagram shows an arrangement used to regulate the thickness of aluminium foil produced in a factory. What is the most suitable radioactive source for the system?

May/June 2018

A radioactive source that emits only gamma radiation is placed before a radiation detector that records the count rate. What has to happen for the count rate to rise?

May/June 2024