Physics Doppler Effect Exam Questions and Answers 100% Solved

Physics Doppler Effect Exam Questions and Answers 100% Solved What is the doppler effect? - answera change in frequency caused by the motion of a sound source In a positive doppler shift the received frequency is [lower, higher] than the transmitted frequency - answerhigher In a negative doppler shift the received frequency is [lower, higher] than the transmitted frequency - answerlower the amount of increase or decrease in doppler frequency depends on what 3 things? - answer1. speed 2. angle 3. frequency of the wave emitted flow information provides what 4 things? - answer1. presence of flow 2. direction of flow 3. speed of flow 4. character of flow How do you acquire flow information? - answerdoppler ultrasound what is the doppler effect? - answerthe change in frequency/wavelength of a sound that results from motion if there is no doppler effect can there still be sound? - answeryes what is required for doppler effect? - answermotion what are the reflectors in human circulation? - answerred blood cells What is doppler shift? - answerthe quantitative measurement of doppler effect How do you determine the doppler shift? - answerthe difference between the received frequency and transmitted frequency how are frequency shift and doppler shift related? - answerthey are the same thing how many crystals are present in CW doppler? - answer2 What is the job of the two crystals in a CW transducer? - answerone continuously sends, the other continuously receives What is the advantage of CW doppler? - answerable to display high velocities without aliasing What is the disadvantage of CW doppler? - answerno imaging what determines the frequency in a CW transducer? - answerthe drive voltage frequency what determines the frequency in a pulsed wave transducer? - answerthickness of crystal What is the Pulsed Wave operating frequency equation? - answerpropagation speed / 2 x crystal thickness the process of extracting the low Doppler frequency from the transducer's carrier frequency is called - answerdemodulation When blood cells move toward the transducer, the Doppler shift is [negative, positive] - answerpositive When blood cells move away from the transducer, the Doppler shift is [negative, positive] - answernegative Doppler frequencies indicate _____ , not _______ - answervelocity, not speed speed is purely a - answermagnitude how is speed reported? - answerdistance over time velocity is defined by a - answermagnitude and a direction What is the biggest disadvantage of PW doppler over CW? - answeraliasing How is "doppler shift" represented in equations? - answerFd How is the operating frequency represented in equations? - answerFo What is the doppler equation? - answerFd = 2x Fo x v x cosθ /c doppler shift is directly related to the _____ of the blood cells - answervelocity the [slower, faster] the velocity, the greater the doppler shift - answerfaster the faster the velocity the [lesser, greater] the doppler shift - answergreater When the velocity is halved the doppler shift is - an