Tag: ultrasound and its applications

Quizzes (0) Questions (93)

Questions Related to ultrasound and its applications

Multiple choice physics medical imaging ultrasonic sound using ultrasound in medicine ultrasound and its applications

What is the wavelength of the ultrasound in water ?

  1. $1.5 mm$
  2. $3.0 cm$
  3. $4.5 cm$
  4. $6.0 cm$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The frequencies used in ultrasonic diagnosis are in the range of 1 to 10 MHz. The speed of sound waves in the tissues of the human body averages about 1540 m/s (close to that for water). So, the wavelength of a 1 MHz wave is about $λ = v/f = 1540/1∙106 = 1.5∙10–3 m = 1.5 mm$.

Multiple choice physics medical imaging ultrasonic sound using ultrasound in medicine ultrasound and its applications

What all are the uses of ultrasound?

  1. Detection of ailments in human body

  2. Cleaning machinery parts

  3. Detection of any deformities in metal blocks

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ultrasound can be used in 

1. detection of ailments in human body
2. cleaning machinery parts where our hand can't reach to clean
3. detection of any deformities in metal blocks
Hence D is the answer. 

Multiple choice physics medical imaging ultrasonic sound using ultrasound in medicine ultrasound and its applications

State whether the given statement is True or False :

Humans can neither hear infrasonic nor ultrasonic sounds. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Audible range of frequency for human ear is  $20 \ Hz$ to $20 \ kHz$. Humans cannot hear sounds having frequency other than this range.
Sounds having frequency lower than $20 \ Hz$ are known as infrasonic sounds and that having frequency greater than $20 \ kHz$ are known as ultrasonic sounds. Thus, humans can neither hear infrasonic nor ultrasonic sounds.

Multiple choice physics medical imaging ultrasonic sound using ultrasound in medicine ultrasound and its applications

Which of the following are applications of ultrasound.

  1. Ultrasound has been used in a variety of clinical settings, including obstetrics and gynecology, cardiology and cancer detection.

  2. Ultrasound is well known to have a significant effect on the rate of various processes in the food industry.

  3. Ultrasound is used in the synthesis of nanostructured materials.

  4. All of these.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The options in the question are given unnecessarily. It can be a direct question.
Below are the applications of ultrasound.

  • Ultrasound has been used in a variety of clinical settings, including obstetrics and gynecology, cardiology and cancer detection. The main advantage of ultrasound is that certain structures can be observed without using radiation. Ultrasound can also be done much faster than X-rays or other radiographic techniques. 
  • Ultrasound is well known to have a significant effect on the rate of various processes in the food industry. Using ultrasound, full reproducible food processes can now be completed in seconds or minutes with high reproducibility, reducing the processing cost, simplifying manipulation and work-up, giving higher purity of the final product, eliminating post-treatment of waste water and consuming only a fraction of the time and energy normally needed for conventional processes. Several processes such as freezing, cutting, drying, tempering, bleaching, sterilization, and extraction have been applied efficiently in the food industry. The advantages of using ultrasound for food processing, includes: more effective mixing and micro-mixing, faster energy and mass transfer, reduced thermal and concentration gradients, reduced temperature, selective extraction, reduced equipment size, faster response to process extraction control, faster start-up, increased production, and elimination of process steps. Food processes performed under the action of ultrasound are believed to be affected in part by cavitation phenomena and mass transfer enhancement. 
  • Ultrasound is used in the synthesis of nanostructured materials.
  • Devices limited to low ultrasonic frequencies, have a number of industrial applications, including drying, ultrasonic cleaning, and injection of fuel oil into burners. 

Multiple choice physics medical imaging ultrasonic sound using ultrasound in medicine ultrasound and its applications

Three different vibrating objects produce three types of sounds X, Y and Z. Sounds X and Y cannot be heared by a man having normal range of hearing but sound Z can be heard easily. The sound X is used in hospital to break kidney stones of a patient into fine grains which then get flushed out with Urine. The sound similar to that which is produced during an earthquake before the main shock wave is generated.Name one device in our homes
which can produce sound like Z.

  1. oven

  2. Doorbell

  3. no such device is there in our homes

  4. all devices produce such sound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

ultrasound is used for removing kidney stones.when ultrasound are targeted on such stone,the stones start vibrating at high frequency.the stone due to this vibratory motion. Breakdown into fine particles.ultrasounds and infrasounds are not audible to man.ultrasound have frequency more than 20kHz.a doorbell can produce an audible sound. Infrasound have frequency below 20Hz, X is ultrasound. Y is infrasound, Z is audible sound.