Chapter 2 Radiation Physics Part I Questions
with Accurate Answers Graded A+ (2024/2025)
Which of the following describes ionization?
(a) atoms without a nucleus
(b) atom that loses an electron
(c) atom with equal numbers of protons & electrons
(d) none of the above - ✔️✔️(b) atom that loses an electron
Which term describes the process by which unstable atom undergo spontaneous
disintegration in an effort to attain a more balanced nuclear state?
(a) radiation
(b) radioactivity
(c) ionization
(d) ionizing radiation - ✔️✔️(b) radioactivity
Which of the following is not a type of particulate radiation?
(a) alpha particles
(b) beta particles
(c) protons
(d) nucleons - ✔️✔️(d) nucleons
(its Neutrons not nucleons)
Which of the following is not a type of electromagnetic radiation?
(a) electrons
(b) radar wave
(c) microwaves
(d) x-rays - ✔️✔️(a) electrons
(electromagnetic radiation move through space w/wave like motions)
which of the following statements is incorrect?
(a) velocity is the speed of a wave
(b) wavelength is the distance between waves
(c) frequency is the number of wavelengths that pass a given point in a certain amour of
time
(d) frequency & wavelength are inversely related - ✔️✔️(b) wavelength is the distance
between waves
which of the following statements is incorrect?
(a) x-rays travel at the speed of sound
(b) x-rays have no change
(c) x-rays cannot be focused to a point
, (d) x-rays cause ionization - ✔️✔️(a) x-rays travel at the speed of sound
(travel at the speed of light not sound)
Which of the following statement is correct?
(a) x-rays are a form of electromagnetic radiation; visible light is not.
(b) x-rays have more energy than does visible light.
(c) x-rays have a longer wavelength than does visible light.
(d) x-rays travel more slowly than does visible light. - ✔️✔️(b) x-rays have more energy
than does visible light.
Which of the following regulates the flow of electrical current to the filament of the x-ray
tube?
(a) high-voltage circuit
(b) low-voltage circuit
(c) high-voltage transformer
(d) low-voltage transformer - ✔️✔️(b) low-voltage circuit
(Filament=low-voltage circuit)
(high-voltage circuit= propel electrons to make X-rays)
Which transformer in the x-ray machine is used to increase the voltage from the
incoming 110- or 220-line voltage to the 65,000 to 100,000 volts required?
(a) step-up transformer
(b) step down transformer
(c) autotransformer
(d) step-up ciruit - ✔️✔️(a) step-up transformer
Which of the following does not occur when the high-voltage circuit is activated?
(a) the unit produces an audible & visible signal.
(b) electrons produced at the cathode are accelerated across the tube to the anode.
(c) x-rays travel from the filament to the target
(d) heat is produced - ✔️✔️(c) x-rays travel from the filament to the target
Which of the following is the location where x-rays are produced?
(a) positive cathode
(b) positive anode
(c) negative cathode
(d) negative anode - ✔️✔️(b) positive anode: convert electrons into x-ray photons.
Which of the following is the location where thermionic emission occurs?
(a) positive cathode
(b) positive anode
with Accurate Answers Graded A+ (2024/2025)
Which of the following describes ionization?
(a) atoms without a nucleus
(b) atom that loses an electron
(c) atom with equal numbers of protons & electrons
(d) none of the above - ✔️✔️(b) atom that loses an electron
Which term describes the process by which unstable atom undergo spontaneous
disintegration in an effort to attain a more balanced nuclear state?
(a) radiation
(b) radioactivity
(c) ionization
(d) ionizing radiation - ✔️✔️(b) radioactivity
Which of the following is not a type of particulate radiation?
(a) alpha particles
(b) beta particles
(c) protons
(d) nucleons - ✔️✔️(d) nucleons
(its Neutrons not nucleons)
Which of the following is not a type of electromagnetic radiation?
(a) electrons
(b) radar wave
(c) microwaves
(d) x-rays - ✔️✔️(a) electrons
(electromagnetic radiation move through space w/wave like motions)
which of the following statements is incorrect?
(a) velocity is the speed of a wave
(b) wavelength is the distance between waves
(c) frequency is the number of wavelengths that pass a given point in a certain amour of
time
(d) frequency & wavelength are inversely related - ✔️✔️(b) wavelength is the distance
between waves
which of the following statements is incorrect?
(a) x-rays travel at the speed of sound
(b) x-rays have no change
(c) x-rays cannot be focused to a point
, (d) x-rays cause ionization - ✔️✔️(a) x-rays travel at the speed of sound
(travel at the speed of light not sound)
Which of the following statement is correct?
(a) x-rays are a form of electromagnetic radiation; visible light is not.
(b) x-rays have more energy than does visible light.
(c) x-rays have a longer wavelength than does visible light.
(d) x-rays travel more slowly than does visible light. - ✔️✔️(b) x-rays have more energy
than does visible light.
Which of the following regulates the flow of electrical current to the filament of the x-ray
tube?
(a) high-voltage circuit
(b) low-voltage circuit
(c) high-voltage transformer
(d) low-voltage transformer - ✔️✔️(b) low-voltage circuit
(Filament=low-voltage circuit)
(high-voltage circuit= propel electrons to make X-rays)
Which transformer in the x-ray machine is used to increase the voltage from the
incoming 110- or 220-line voltage to the 65,000 to 100,000 volts required?
(a) step-up transformer
(b) step down transformer
(c) autotransformer
(d) step-up ciruit - ✔️✔️(a) step-up transformer
Which of the following does not occur when the high-voltage circuit is activated?
(a) the unit produces an audible & visible signal.
(b) electrons produced at the cathode are accelerated across the tube to the anode.
(c) x-rays travel from the filament to the target
(d) heat is produced - ✔️✔️(c) x-rays travel from the filament to the target
Which of the following is the location where x-rays are produced?
(a) positive cathode
(b) positive anode
(c) negative cathode
(d) negative anode - ✔️✔️(b) positive anode: convert electrons into x-ray photons.
Which of the following is the location where thermionic emission occurs?
(a) positive cathode
(b) positive anode
