ARRT Physics and Radiobiology practice questions

10 questions · Untimed · Explanation after each question

X-ray production, bremsstrahlung and characteristic radiation, beam quality and quantity, the inverse square law, photoelectric and Compton interactions, SI units, radiosensitivity and biological effects. Radiation Physics and Radiobiology has 21 of the 200 scored questions on the ARRT radiography exam.

Line drawing of a cutaway x-ray tube with a cathode filament in its focusing cup and a rotating anode disk inside the tube housing

Before you start

Every question has four options and one correct answer. Each explanation says why the answer is right and why the most tempting wrong answer is wrong.
Check each answer to see the explanation before moving on. Checked answers cannot be changed.

Original practice questions written to the ARRT Radiography Examination Content Specifications, not ARRT exam questions. Independent practice, not affiliated with or endorsed by The American Registry of Radiologic Technologists (ARRT) or Pearson VUE. ARRT and R.T. are trademarks of the ARRT.