Free Biological and Medical Uses of Radiation MCQs with Answers
50 Biological and Medical Uses of Radiation MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Radiation in medicine includes X-rays and gamma rays for imaging, radioactive tracers for diagnosis, and controlled radiation for destroying cancerous tissue. The topic also covers CT scans, PET imaging, radiotherapy, sterilisation, half-life and dosage, alongside biological damage, shielding and the need to balance diagnostic or therapeutic benefit against exposure.
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50 questions · page 3 of 3
- A. kJ / mol
- B. J / mol
- C. kg / J
- D. J / kg
Explanation: The absorbed dose is the amount of energy from ionizing radiation absorbed per unit mass of a material.
Correct answer: J / kg- A. Iodine-131
- B. Phosphorous-32
- C. Strontium-90
- D. Cobalt-60
Explanation: Radioiodine, 131I, has been used for the treatment of hyperthyroidism and metastases of well-differentiated thyroid carcinoma.
Correct answer: Iodine-131- A. Sterilization
- B. Study of circulation of blood
- C. Skin Cancer
- D. Thyroid Cancer
Explanation: Na-24 is a radioisotope that is used to study the circulation of blood.
Correct answer: Study of circulation of blood- A. 1 Rad
- B. 1 Sievert
- C. 1 Yellow
- D. 1 Gray
Explanation: 1 Gray is the unit of absorbed radiation equal to the dose of one joule of energy absorbed per kilogram of matter, or 100 rad.
Correct answer: 1 Gray- A. Bones reflect greater number of X-rays
- B. Bones absorb a lower amount of X-rays
- C. Bones absorb greater number of X-rays
- D. Bones totally reflect X-rays
Explanation: X-rays are a technique used in radiography in which electromagnetic radiation differentially penetrates tissues inside the body and…
Correct answer: Bones absorb greater number of X-rays- A. Iron
- B. Nickel
- C. Brass
- D. Tungsten
Explanation: Most x-ray tube anodes are made of tungsten (the target material). Tungsten has a high atomic number (Z = 74) and a high melting point of…
Correct answer: Tungsten- A. 0.01
- B. 0.001
- C. 10
- D. 100
Explanation: The correct statement is D. 0.001. The relation between gray and rad is 1 Gy = 100 rad.
Correct answer: 100- A. Lead
- B. Steel
- C. Iron
- D. Copper
Explanation: Lead is commonly used as a shield against X-rays due to its high density and high atomic number.
Correct answer: Lead- A. Excitation phenomena
- B. Ionization
- C. Photoelectric effect
- D. Heating
- E. All of them
Explanation: The correct answer is All of them.Radiation can harm living organisms through a combination of mechanisms: excitation can cause energy…
Correct answer: All of them- A. Particle property
- B. Cost of X-ray unit is low
- C. High penetrating power
- D. It is not electromagnetic waves
Explanation: X-rays are a type of electromagnetic radiation with high frequency and energy, which grants them significant penetrating power.
Correct answer: High penetrating power