Physics 9702 · AS & A Level
Production and use of ultrasound
42 practice questions on Production and use of ultrasound, with worked solutions and instant marking.
A parallel ultrasound beam is normally incident on the surface of a fat layer with thickness $1.1\,\text{cm}$, as illustrated in Fig. 6.1. For the ultrasound, $I_1$ denotes the intensity immediately after the wave enters the fat surface, $I_2$ denotes the intensity incident on the fat-muscle boundary, $I_3$ denotes the intensity reflected from the fat-muscle boundary, and $I_4$ denotes the intensity that returns to the fat surface. Some data for the fat are shown in Fig. 6.2.
Feb/March 2016
Explain the main principles used to generate ultrasound waves for medical applications.
Feb/March 2017
Explain the key principles involved in using ultrasound to get diagnostic information about internal body structures.
Feb/March 2018
Explain why ultrasound used for medical diagnosis is sent out in pulses.
Feb/March 2020
Electrons in a vacuum are accelerated by a potential difference of $84\,\text{kV}$. They then collide with a metal target and X-rays are produced. Calculate the minimum wavelength of the X-rays that are produced.
Feb/March 2024
A tiny crystal is set oscillating in simple harmonic motion. Figure 4.1 shows how the displacement $x$ of one face of the crystal from its equilibrium position changes with time $t$.
Feb/March 2025
Explain the key principles used to generate ultrasound so that diagnostic information about internal body structures can be obtained.
May/June 2010
Explain the key ideas involved in producing ultrasound so that diagnostic information about internal body structures can be obtained.
May/June 2010
State what the acoustic impedance $Z$ of a medium means.
May/June 2011
State what is meant by acoustic impedance, with reference to ultrasound waves.
May/June 2013
State what the specific acoustic impedance of a medium means.
May/June 2015
State what the specific acoustic impedance of a medium means.
May/June 2016
State the meaning of the specific acoustic impedance of a medium.
May/June 2016
Explain the basic principles that underlie the use of ultrasound to obtain diagnostic information about internal body structures.
May/June 2017
Piezo-electric transducers are employed to produce ultrasonic waves.
May/June 2018
Piezo-electric transducers are employed to produce ultrasonic waves.
May/June 2018
State the meaning of the specific acoustic impedance of a medium.
May/June 2019
Using an ultrasound wave, explain what specific acoustic impedance means.
May/June 2020
Explain the principles behind the detection of ultrasound waves for medical diagnosis.
May/June 2020
By referring to an ultrasound wave, Explain the meaning of specific acoustic impedance.
May/June 2020
Outline the use of ultrasound to obtain diagnostic information about internal body structures.
May/June 2021
Outline the way ultrasound is used to obtain diagnostic details about internal body structures.
May/June 2021
Table 8.1 presents data on the properties of air, gel and body tissue. All values are quoted to three significant figures.
May/June 2023
Table 8.1 presents some data about the properties of air, gel and body tissue. The data are given to three significant figures.
May/June 2023
Describe how reflected ultrasound pulses can be used to provide diagnostic information about structures inside the body.
May/June 2024
Describe the process by which the piezoelectric crystal in a transducer produces ultrasound waves for medical diagnosis.
May/June 2025
State what acoustic impedance means for a medium.
Oct/Nov 2010
State what the acoustic impedance of a medium means.
Oct/Nov 2010
Explain the principles behind the generation and detection of ultrasound waves.
Oct/Nov 2011
Explain the key principles of using ultrasound to collect diagnostic information about internal body structures.
Oct/Nov 2013
Explain the basic principles of using ultrasound to gather diagnostic information about structures inside the body.
Oct/Nov 2013
By using ultrasound waves, state what the specific acoustic impedance of a medium means.
Oct/Nov 2014
Ultrasound can be used to gather information about structures inside the body.
Oct/Nov 2016
Explain the principles that underlie the production of ultrasound waves for medical diagnosis.
Oct/Nov 2017
Explain the main principles that underlie the use of ultrasound for obtaining diagnostic information about internal body structures.
Oct/Nov 2018
Explain the key ideas behind using ultrasound to obtain diagnostic information about internal body structures.
Oct/Nov 2018
State the meaning of the specific acoustic impedance of a medium.
Oct/Nov 2019
Explain the physics behind the production of ultrasound waves used in medical diagnosis.
Oct/Nov 2020
Explain the principles behind the generation of ultrasound waves for use in medical diagnosis.
Oct/Nov 2020
A piezoelectric transducer with a quartz crystal is used to collect diagnostic information about internal structures. Describe the function of the quartz crystal.
Oct/Nov 2021
Table 10.1 lists the specific acoustic impedance $Z$ values for body tissue, water and steel.
Oct/Nov 2025
Question on specific acoustic impedance and ultrasound.
Oct/Nov 2025