Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Units (Radioactivity)
18 practice questions
Practice questions
1–10 of 18
Question 1
1 mark · Easy
Answer and see the solution →What is the SI unit for measuring the activity of a radioactive sample?
Question 2
3 marks · Easy
Answer and see the solution →A radioactive isotope emits 120 decays in 4 minutes. Answer the following:
(a)[1 mark]Calculate the total time in seconds.
(b)[2 marks]Calculate the activity, giving its unit.
Question 3
1 mark · Easy
Answer and check →Which unit would be most appropriate to measure the thickness of a metal foil used to absorb beta radiation?
- A.kilogram (kg)
- B.centimetre (cm)
- C.second (s)
- D.becquerel (Bq)
Question 4
1 mark · Easy
Answer and see the solution →When recording how long it takes for a radioactive source's activity to fall to half, which two units of time might be used?
Question 5
2 marks · Easy
Answer and see the solution →You are measuring background radiation using a Geiger-Müller tube for 3 minutes.
(a)[1 mark]Which SI unit is used for recording the number of radioactive decays detected per second?
(b)[1 mark]Convert 3 minutes into seconds.
Question 6
1 mark · Easy
Answer and check →Which of the following is NOT a unit used in radioactivity experiments according to the syllabus content?
- A.second (s)
- B.minute (min)
- C.hour (h)
- D.ampere (A)
Question 7
2 marks · Easy
Answer and see the solution →Explain why it is important to use the correct SI unit when reporting the activity of a radioactive source in scientific investigations.
Question 8
1 mark · Easy
Answer and see the solution →Name the unit that should be used for the distance between a radioactive source and a detector in a practical experiment.
Question 9
1 mark · Normal
Answer and see the solution →State the unit of activity for a radioactive source.
Question 10
1 mark · Normal
Answer and see the solution →Which unit would be used to measure the thickness of a sheet of material when investigating the penetration power of different types of radiation?