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Objective Questions

Latest NEET PG Radiology Exam Question (Objective Questions), MCQ in English

Subjects : Radiology

Question Bank NEET PG Radiology - English
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Radiology

Question 1Single Answer
What is the primary component of the atomic nucleus?
  1. A
    Electrons
  2. B
    Quarks
  3. C
    Photons
  4. D
    Protons and neutrons
Question 2Single Answer
What is the charge of an electron?
  1. A
    Positive
  2. B
    Negative
  3. C
    Neutral
  4. D
    Variable
Question 3Single Answer
Which particle in the atom has no charge?
  1. A
    Neutron
  2. B
    Electron
  3. C
    Proton
  4. D
    Photon
Question 4Single Answer
What is the approximate mass of a proton compared to an electron?
  1. A
    Equal
  2. B
    1836 times heavier
  3. C
    1836 times lighter
  4. D
    Twice as heavy
Question 5Single Answer
Where are electrons located in an atom?
  1. A
    Nucleus
  2. B
    Neutron orbit
  3. C
    Proton shell
  4. D
    Electron cloud
Question 6Single Answer
What determines the atomic number of an element?
  1. A
    Number of protons
  2. B
    Number of neutrons
  3. C
    Number of electrons
  4. D
    Number of nucleons
Question 7Single Answer
What is the role of electrons in X-ray production?
  1. A
    Emitting X-rays
  2. B
    Absorbing X-rays
  3. C
    Accelerating protons
  4. D
    Stabilizing the nucleus
Question 8Single Answer
Which part of the atom is involved in the photoelectric effect?
  1. A
    Outer-shell protons
  2. B
    Inner-shell electrons
  3. C
    Neutrons
  4. D
    Nucleus
Question 9Single Answer
What is the primary source of energy for electron transitions in an atom?
  1. A
    Electromagnetic radiation
  2. B
    Nuclear fission
  3. C
    Chemical reactions
  4. D
    Thermal energy
Question 10Single Answer
Which subatomic particle is most relevant to diagnostic radiology?
  1. A
    Electron
  2. B
    Proton
  3. C
    Neutron
  4. D
    Positron
Question 11Single Answer
What type of radiation is used in conventional radiography?
  1. A
    Gamma rays
  2. B
    Ultraviolet rays
  3. C
    Radio waves
  4. D
    X-rays
Question 12Single Answer
Which property distinguishes X-rays from radio waves?
  1. A
    Wavelength
  2. B
    Speed
  3. C
    Charge
  4. D
    Mass
Question 13Single Answer
What is the speed of electromagnetic radiation in a vacuum?
  1. A
    3 x 106 m/s
  2. B
    3 x 108 m/s
  3. C
    3 x 1010 m/s
  4. D
    3 x 104 m/s
Question 14Single Answer
Which type of electromagnetic radiation has the highest energy?
  1. A
    Radio waves
  2. B
    X-rays
  3. C
    Gamma rays
  4. D
    Microwaves
Question 15Single Answer
What is the primary source of X-rays in diagnostic radiology?
  1. A
    X-ray tube
  2. B
    Radioactive decay
  3. C
    Nuclear fission
  4. D
    Synchrotron radiation
Question 16Single Answer
Which characteristic of X-rays allows them to penetrate tissues?
  1. A
    Low frequency
  2. B
    High energy
  3. C
    Long wavelength
  4. D
    Low amplitude
Question 17Single Answer
What is the unit of energy for electromagnetic radiation?
  1. A
    Joule per second
  2. B
    Electron volt (eV)
  3. C
    Watt
  4. D
    Newton
Question 18Single Answer
Which property of X-rays is critical for imaging contrast?
  1. A
    Energy
  2. B
    Frequency
  3. C
    Amplitude
  4. D
    Speed
Question 19Single Answer
Which type of electromagnetic radiation is used in MRI?
  1. A
    Gamma rays
  2. B
    X-rays
  3. C
    Radio waves
  4. D
    Ultraviolet rays
Question 20Single Answer
What is the relationship between wavelength and frequency of electromagnetic radiation?
  1. A
    Unrelated
  2. B
    Directly proportional
  3. C
    Equal
  4. D
    Inversely proportional
Question 21Single Answer
Which type of radioactive decay emits helium nuclei?
  1. A
    Electron capture
  2. B
    Beta decay
  3. C
    Gamma decay
  4. D
    Alpha decay
Question 22Single Answer
What is the primary emission in beta decay?
  1. A
    Electrons or positrons
  2. B
    Helium nuclei
  3. C
    Photons
  4. D
    Neutrons
Question 23Single Answer
Which type of decay does not involve particle emission?
  1. A
    Beta decay
  2. B
    Alpha decay
  3. C
    Gamma decay
  4. D
    Neutron emission
Question 24Single Answer
What is the half-life of a radioactive isotope?
  1. A
    Time for complete decay
  2. B
    Time for half the nuclei to decay
  3. C
    Time for emission of one particle
  4. D
    Time for stabilization
Question 25Single Answer
Which isotope is commonly used in nuclear medicine imaging?
  1. A
    Technetium-99m
  2. B
    Iodine-131
  3. C
    Carbon-14
  4. D
    Uranium-238
Question 26Single Answer
What is the primary source of gamma rays in radiology?
  1. A
    X-ray tube
  2. B
    Radioactive decay
  3. C
    Electron acceleration
  4. D
    Nuclear fission
Question 27Single Answer
Which decay law governs radioactive decay?
  1. A
    Linear decay
  2. B
    Exponential decay
  3. C
    Quadratic decay
  4. D
    Logarithmic decay
Question 28Single Answer
What is the unit of radioactivity?
  1. A
    Joule
  2. B
    Gray
  3. C
    Sievert
  4. D
    Becquerel
Question 29Single Answer
Which type of radiation has the highest penetrating power?
  1. A
    Alpha particles
  2. B
    Gamma rays
  3. C
    Beta particles
  4. D
    Neutrons
Question 30Single Answer
What factor determines the rate of radioactive decay?
  1. A
    Atomic number
  2. B
    Half-life
  3. C
    Electron configuration
  4. D
    Temperature
Question 31Single Answer
Which interaction is most important in diagnostic radiology at low energies?
  1. A
    Photoelectric effect
  2. B
    Compton scattering
  3. C
    Pair production
  4. D
    Coherent scattering
Question 32Single Answer
What happens in the photoelectric effect?
  1. A
    X-ray photon scatters with energy loss
  2. B
    X-ray photon ejects an inner-shell electron
  3. C
    X-ray photon produces an electron-positron pair
  4. D
    X-ray photon is fully absorbed
Question 33Single Answer
Which interaction dominates at higher X-ray energies (100-150 keV)?
  1. A
    Pair production
  2. B
    Photoelectric effect
  3. C
    Compton scattering
  4. D
    Coherent scattering
Question 34Single Answer
What is the minimum energy required for pair production?
  1. A
    100 keV
  2. B
    02 MeV
  3. C
    50 keV
  4. D
    10 keV
Question 35Single Answer
Which factor increases the probability of the photoelectric effect?
  1. A
    Low photon energy
  2. B
    Low atomic number
  3. C
    High electron density
  4. D
    High atomic number
Question 36Single Answer
What is the primary source of scattered radiation in diagnostic radiology?
  1. A
    Pair production
  2. B
    Photoelectric effect
  3. C
    Compton scattering
  4. D
    Bremsstrahlung
Question 37Single Answer
Which interaction contributes most to image contrast in radiography?
  1. A
    Coherent scattering
  2. B
    Compton scattering
  3. C
    Pair production
  4. D
    Photoelectric effect
Question 38Single Answer
What is the primary effect of Compton scattering on image quality?
  1. A
    Decreased density
  2. B
    Increased contrast
  3. C
    Decreased resolution
  4. D
    Increased noise
Question 39Single Answer
Which tissue is most likely to undergo the photoelectric effect?
  1. A
    Air
  2. B
    Muscle
  3. C
    Fat
  4. D
    Bone
Question 40Single Answer
Which interaction is negligible in diagnostic radiology?
  1. A
    Coherent scattering
  2. B
    Photoelectric effect
  3. C
    Compton scattering
  4. D
    Pair production
Question 41Single Answer
What is attenuation in radiology?
  1. A
    Increase in X-ray intensity
  2. B
    Reduction in X-ray intensity through matter
  3. C
    Scattering of electrons
  4. D
    Emission of gamma rays
Question 42Single Answer
Which factor affects the attenuation coefficient?
  1. A
    Electron speed
  2. B
    Photon wavelength
  3. C
    Tissue density
  4. D
    Magnetic field
Question 43Single Answer
What is the relationship between attenuation and atomic number?
  1. A
    Directly proportional
  2. B
    Inversely proportional
  3. C
    No relationship
  4. D
    Logarithmic
Question 44Single Answer
Which tissue has the highest attenuation in X-ray imaging?
  1. A
    Fat
  2. B
    Muscle
  3. C
    Bone
  4. D
    Air
Question 45Single Answer
Which factor decreases X-ray attenuation?
  1. A
    Thicker tissue
  2. B
    Higher tissue density
  3. C
    Higher atomic number
  4. D
    Higher photon energy
Question 46Single Answer
What is the primary cause of attenuation in soft tissues?
  1. A
    Coherent scattering
  2. B
    Photoelectric effect
  3. C
    Pair production
  4. D
    Compton scattering
Question 47Single Answer
Which law governs X-ray attenuation?
  1. A
    Planck’s law
  2. B
    Ohm’s law
  3. C
    Newton’s law
  4. D
    Beer-Lambert law
Question 48Single Answer
What increases attenuation in diagnostic radiology?
  1. A
    Thicker tissue
  2. B
    Lower photon energy
  3. C
    Higher atomic number
  4. D
    All of the above
Question 49Single Answer
Which material is used to reduce attenuation in X-ray imaging?
  1. A
    Bone
  2. B
    Lead
  3. C
    Air
  4. D
    Water
Question 50Single Answer
What is the primary component of an X-ray tube?
  1. A
    Detector and screen
  2. B
    Magnet and coil
  3. C
    Cathode and anode
  4. D
    Filter and collimator
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