Piezoelectric effect - Study guides, Class notes & Summaries

Wilhelm Conrad Roentgen discovered x-ray by: - observing light emitted from a chemical compound Thomas Edison contributed greatly to the field of radiology by: - discovering the use of calcium tungstate The scientist Michael Faraday is noted for - experiments in electromagnetic induction. Roentgen discovered x-rays in: - 1895 The piezoelectric effect describes how a voltage is produced by applying stress to a certain type of crystal. This effect was discovered by: - Jacques and Pierre Curi...

piezoelectric effect? CORRECT ANSWER property of certain materials to create a voltage when pressure is applied -indirect piezoelectric effect reverse piezoelectric effect? CORRECT ANSWER property of certain materials to deform when voltage is applied to them and create pressure (sound) -direct piezoelectric effect what piezoelectric material is used in ultrasound transducers? CORRECT ANSWER lead zirconate titanate (PZT) PZT crystal thickness? CORRECT ANSWER 1/2 wavelength thick ...

The human ear can perceive sounds up to _______, above which sounds are referred to as "ultrasound." a. 5 kHz b. 20 kHz c. 5 MHz d. 20 MHz Correct Answer-B: 20 kHz. Ultrasound frequencies in imaging are usually 3-12 MHz The piezoelectric effect refers to converting ____ energy into ____ energy. Correct Answer-Electrical energy into kinetic or mechanical energy. Which of the following is NOT a parameter to be considered when minimizing ultrasound-induced thermal injury? a. Haired/n...

RADT Final Questions & Verified Correct Answers Already Passed!! Wilhelm Conrad Roentgen discovered x-ray by: - ANSWER : observing light emitted from a chemical compound Thomas Edison contributed greatly to the field of radiology by: - ANSWER : discovering the use of calcium tungstate The scientist Michael Faraday is noted for - ANSWER : experiments in electromagnetic induction. Roentgen discovered x-rays in: - ANSWER : 1895 The piezoelectric effect describes how a voltage ...

ARDMS SPI STUDY GUIDE QUESTIONS AND ANSWERS ALREADY PASSED In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... Remain the Same because stiffness and density affect Propagation Speed. What is the audible range? 20-20,000Hz >20,000Hz=Ultrasound Frequency is measured in Hertz (Hz) is Cycles per Second Not affected by sonographer Increase Frequency; Decrease Depth A period is the length of time it takes for one complete wavelength to pass a fixed poin...

Which of the following wires has the greatest cross sectional area? 9 AWG The capacitance of a capacitor ____if the distance between the plates decreases while all other properties of the capacitor remain the same. increases A voltmeter that converts AC to DC by rectifying the voltage, would be used to indicate the correct value of measured ______. varying DC voltages only in the drawing below, what is the current through the resistor? 10V 5Ω 2 amps which of the below waveforms show appro...

RCIS REGISTRY Question and answers verified to passRCIS REGISTRY ultrasound transducers are composed of what - correct answer piezoelectric crystal A change in electrical charge on a crystal following mechanical stress us termed - correct answer piezoelectric effect what employs a single piezoelectric element that both sends and recieves - correct answer doppler flow-wire transducer MHZ infant transthoracic heart - correct answer 5.0-7.5 MHZ adult transthoracic heart - cor...

Bit - 0's and 1's Nibble - 4 Bits Byte - 8 Bits OR 2 Nibbles Word - 2 Bytes, 8 Nibbles and 16 Bits Sampling - Converts signal to discrete time signal Quantization - Converts discrete time signal to discrete amplitude signal Soldering (4) - Soldering is a process in which two or more metal items are joinedby melting and then flowing a filler metal into the joint Input Device: Types of Thermistors (4) - - Negative Temperature Coefficient (NTC) - Positive Temperature Coefficient (PTC) N...

CET study guide questions and answers 100% pass Which of the following wires has the greatest cross sectional area? 9 AWG The capacitance of a capacitor ____if the distance between the plates decreases while all other properties of the capacitor remain the same. increases A voltmeter that converts AC to DC by rectifying the voltage, would be used to indicate the correct value of measured ______. varying DC voltages only in the drawing below, what is the current through the resis...

Advantages of ultrasonic instruments - ANSWER-Increased efficiency of large calculus removal -Less time -Multiple surfaces of working end -Never need sharpening -Tips are replaced less often -Does not need lateral pressure -Reduced risk of repetitive strain injuries -Water lavage and irrigation may enhance healing and client comfort -Acoustic mainstreaming removes bacteria Disadvantages of ultrasonic instruments - ANSWER-Higher risk of burnished calculus if used alone -Unavoid...