VCE Physics: Radiation Dose and Decay Quiz

A patient undergoing an X-ray receives an absorbed dose of 0.02 Gy. The radiation weighting factor for X-rays is 1. What is the equivalent dose in sieverts?

• 0.002 Sv

• 0.02 Sv

• 0.2 Sv

• 2 Sv

A worker is exposed to 0.05 Gy of alpha radiation . Calculate the equivalent dose.

• 0.05 Sv

• 0.5 Sv

• 1 Sv

• 10 Sv

A radiographer receives an equivalent dose of 0.02 Sv to their thyroid (wt = 0.04). What is the effective dose received?

• 0.0008 Sv

• 0.002 Sv

• 0.008 Sv

• 0.08 Sv

A patient undergoing radiation therapy receives an absorbed dose of 0.1 Gy to their lungs. Given that the radiation is beta particles and the tissue weighting factor for lungs is 0.12, calculate the effective dose.

• 0.0012 Sv

• 0.012 Sv

• 0.12 Sv

• 1.2 Sv

A technician receives an effective dose of 0.015 Sv from exposure to gamma rays affecting a tissue with wt= 0.05. What was the absorbed dose?

• 0.15 Gy

• 0.3 Gy

• 0.005 Gy

• 0.01 Gy

A scientist working in a lab receives an equivalent dose of 0.06 Sv from neutron radiation (wr = 5). What was the absorbed dose?

• 0.012 Gy

• 0.3 Gy

• 0.06 Gy

• 0.01 Gy

A radioactive isotope has a half-life of 6 hours. If a sample starts with 800 g, how much remains after 18 hours?

• 100 g

• 200 g

• 400 g

• 50 g

A scientist is working with a radioactive material that has a half-life of 3 days. If the initial activity is 5000 Bq, what will the activity be after 9 days?

• 1250 Bq

• 625 Bq

• 2500 Bq

• 1560 Bq

Thorium-234 undergoes beta minus decay. What is the new element formed?

• Radium-230

• Protactinium-234

• Uranium-238

• Lead-210

Radon-222 undergoes alpha decay. What is the resulting element?

• Radium-226

• Polonium-218

• Thorium-234

• Actinium-225