Physics Mock Test Ch 7-11

3 Questions

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Physics Quizzes & Trivia

US physics mock test for chapter 7-11 final.


Questions and Answers
  • 1. 
    In the Fraunhofer zone:
    • A. 

      The beam diverges because of inadequate damping

    • B. 

      The beam diverges in the Near zone

    • C. 

      The beam of an unfocused transducer diverges

    • D. 

      The length of the Fresnel zone is long

  • 2. 
    The piezoelectric effect can be described as:
    • A. 

      Density of tissues and the speed of sound in tissues

    • B. 

      Mechanical deformation that results from high voltage applied on faces of the crystal and in turn generates ultrasound

    • C. 

      Piezoelectric crystal subjected to pressure resulting in electrical charge appearing on their surfaces

    • D. 

      Having a damaging effect on crystal due to high voltage

  • 3. 
    • A. 

      Increase in size

    • B. 

      Decrease in size

    • C. 

      Loses it's polarization

    • D. 

      Increase or decrease in size depending on the voltage polarity