Expert Physics Tutoring

Q1. Knowledge Recall (1 mark)

Define the term "background radiation."

Q2. Knowledge Recall (1 mark)

Name one of the three main natural sources of background radiation.

Q3. Application of Knowledge (2 marks)

Explain why background radiation levels are higher near airports.

Q4. Application of Knowledge (2 marks)

Describe how radioactive decay contributes to background radiation.

Q5. Data Analysis/Calculations (3 marks)

Given the following data:

- Average dose of background radiation: 2.4 mSv/year

- Lifetime dose limit for workers: 100 mSv

Calculate the number of years a worker can work before reaching the lifetime dose limit.

Q6. Knowledge Recall (1 mark)

State the SI unit of radioactivity.

Q7. Application of Knowledge (2 marks)

Explain the difference between ionizing radiation and non-ionizing radiation.

Q8. Data Analysis/Calculations (3 marks)

A Geiger-Müller counter registers a count rate of 50 counts per minute. If the background count rate is 10 counts per minute, calculate the activity of the radioactive source.

Q9. Knowledge Recall (1 mark)

Name one health effect associated with prolonged exposure to background radiation.

Q10. Application of Knowledge (2 marks)

Explain one method used to reduce the exposure to background radiation.