solar cell, thermocouple etc.). voltage or current) which is proportional to the quantity under measurement. 0 like 0 dislike. d. All of the above. The electromagnetic transducer is self-generating active transducers. Strain gauge is a . 4. a) Strain gauge b) Encoder c) Thermistor d) LVDT Ans : (b) 5. A transducer is a device that converts energy from one form to another. a Matching layer. Compare active transducer with passive transducer based on working principle, example, advantage, application. Usually a transducer converts a signal in one form of energy to a signal in another. Passive Type Transducers. The transducer, which can produce one of the electrical quantities such as voltage and current is known as active transducer. Inductive transducer: Although not generally thought of as transducers, photocells, LEDs (light-emitting diodes), and even common light bulbs are transducers. Active Transducers. Transducer Applications. The diameter of the active element of a transducer helps to determine the frequency of the US produced by the transducer True - it also is used to improve image quality The damping material in a transducer acts to decreased the sensitivity. Active Transducers; Passive Transducers; Now, let us discuss about these two types of transducers briefly. (A) Distance (B) Latent heat (C) Force (D) Size. The electrical energy pulse is generated from an instrument such as a flaw detector. B. a) the propagation speed of the ultrasound transducer's matching layers b) the thickness of the transducer's backing material c) the impedance of the transducer's matching layer d) the propagation speed of the transducer's active element 5. The applications of transducers based on the electric parameter used and the principle involved is given below. Resistance Strain Gauge – The change in value of resistance of metal semi-conductor due to elongation or compression is known by … Position . Which of the following is a digital transducer? b. Other articles where Active transducer is discussed: transducer: The active transducers generate electric current or voltage directly in response to stimulation. There are many active elements, which are firing at almost the same time in a mechanical scanner. Ø These transducers develop an electrical parameter (i.e. 5. B. MBR LOTS JAMMU BRG ⇒ The z-transform of sequence x = δ is 1 ∞ 0 z ⇒ A fully controlled bridge converter feeds a highly inductive load such that the load current can be assumed to be constant. 1. Based on its working transducers are classified into the following; Electric and Non-Electric Transducers; Active and Passive Transducers; Primary and Secondary Transducers ; Analog and Digital Transducers Electric and Non-Electric Transducers: Electronic Transducers are that type of transducers that convert one form of energy to an electrical structure of energy, for Example, microphone. Frequency C. Hertz D. The classification of transducer-based on the source of energy can be done through two types which include the following. c Damping material. Factors in Choice Many factors must be considered when selecting which type of transducer to use for a task: sensitivity; range; temperature coefficient; linearity; size; cost; C. Types of Transducers i. 3. Throughout electromagnetic transduction, the measurement spectrum is transformed to voltage caused by a change in the magnetic flux in the conductor, in the absence of excitation. Thus it does not require any battery supply for conversion (e.g. An ultrasound unit, which can display two-dimensional images and A mode at the same time, is called . B. Alternatively, a transducer is defined as a device which provides usable output response to a specific input measured which may be a physical quantity. Mainly, the electrical transducers can be classified into the following two types. Flat bottom holes. On the contrary, a passive transducer converts a form of energy into another (electrical) by making use of an external source of power.. The speed of response of the transducer should be as high as practicable. D Primary transducers. This is the first type of classification of a transducer. a may be crystalline material. Artificial flaws can be produced by using: a. b Doppler effect. 10. This will make the measurement system very compact. C. A C mode scanner. Which of following represent active transducer? Ø These transducers do not require any external source or power for their operation. Speed of Response: It is the rapidity with which the transducer responds to changes in the measured quantity. View Answer. Apart from this, transducers are classified into following types: Primary and Secondary Transducer; Passive and Active Transducer; Analog and Digital Transducer; Transducers and Inverse Transducer; This classification in shown below in pictorial form to have better grasp of the subject matter. Transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities (energy, force, torque, light, motion, position, etc.). Explanation of Each Types of Transducers: Classification based upon Principle of … The active element is a piezoelectric or single crystal material which converts electrical energy to ultrasonic energy. With a phased array scanner, there are many active elements which are being … Passive device and converts electrical displacement into a change of resistance . Which of the following is most important in the determination of the frequency of the sound? A. True. View Answer Answer: Analog transducers 16 Which of the following is a digital transducer? Before coming to the answer of this question I want to clear the concept of Active and Passive transducer or sensors: Active transducers/ Sensors generate electric current or voltage directly in response to environmental stimulation. Which of the following waves is only able to travel through a thin section of material? Question:14. Ø They can be subdivided into the following commonly used types . 4. Active Transducers; Passive Transducers; Active Transducers. Active Transducer A transducer which requires energy to be added, for example a photo resistor. In passive transducer, it requires externalbattery supply. Based on whether the transducer is active or passive. For a closed loop controlled d.c. drive, current limit control (CLC) is normally employed. B. Thermistor. Common examples include microphones, loudspeakers, thermometers, position and pressure sensors, and antenna. Which of the following represent active transducer? Q5. Which transducer is known as ‘self-generating transducer’? Derive:- Energy = Magnetic fields × Length of conductor. (A) Thermocouple (B) Piezoelectric pick-up; The following should be considered while selection a transducer: - Which one of the following frequency meter is suitable for measuring radio frequency? A Active transducers. Strain gauge. d Coupling medium. A. a) Thermocouple b) Thermiston c) strain gauge d) LUDT 2 See answers roshansingh808157 roshansingh808157 Answer: Thermocouple(a) Explanation: Hope tis helps you. A shear waves c. A surface wave d. A lamb wave. C Thermistor. C Analog transducers. A. Following transducer is an active transducer: Which one of the following is not a transducer in the true sense? D. None of the above. Classifications of transducers – broadly the transducers are classified into two main types: active transducers and passive transducers. Answer: d Explanation: Active transducers are self-generating type, they don’t require external power to work while passive transducers require external power to work. D. Thermocouple. a. B Encoder. False. The wave shape of input current is dc sinusoidal rectangular none of the above a. Direct the sound out of the transducer B. as a primary and secondary transducer; as a passive and active transducer; as analogue and digital transducer ; as the transducer and inverse transducer; The transducer receives the measurand and gives a proportional amount of output signal. It is an alloy of A. 1. 61) The purpose of the backing material in a transducer is to: A. asked Apr 14, 2018 by anonymous. Which of the following represent active transducer? Passive and Active transducers; Analog and Digital transducers; Transducers and Inverse transducers . Side drilled holes. Resistance Variation Type. It will also then receives back ultrasonic energy and converts it to electrical energy. A longitudinal wave b. ANSWER: C. Passive device and converts mechanical displacement into a change of resistance . b operate on the basis of the photoelectric effect. For example, a Strain Gauge is an Active Transducer, in which the strain is converted into resistance. A duplex scanner. No Solution. a) Strain gauge b) Thermistor c) LVDT d) Thermocouple View Answer. D. Active device and converts electrical displacement into a change of resistance View Answer / Hide Answer. A. New questions in Physics . The active transducer generates its own electrical voltage during conversion. The active elements of the diagnostic ultrasound transducer. Objective Question. Provide impedance matching between the active element and the test component C. Control the ringing of the active element D. None of the above 62) The number of cycles per second is the definition of: A. A commpound scanner. 2-Which of the following form the basis of Electrical domain? A transducer that converts measurand into the form of pulse is called a) Active transducer b) Analog transducer c) Digital transducer d) Pulse transducer Ans : (d) 4. In this case, sensitivity is reduced but other advantages, as the reduction of the transducer dead zone for pulse-echo operations, can be achieved. c convert electrical energy into mechanical energy. Wave speed B. The major difference between active and passive transducer is that an active transducer has the ability to convert one form of energy into another form (electrical) without using an external source of power. Classification of transducers. Size: The transducer should have smallest possible size and shape with minimal weight and volume. A)passive transducers B) active transducers C) Digital D) output transducers Correct Answer : active transducers Q :A photo diode functions are A)photo conductive device while working with reverse voltage B) photo voltaic device while working with out reverse voltage C) photo voltaic while working with or with out reverse voltage Classification of Transducers based on transduction Principle. Ø Active transducers are self-generating type of transducers. Active device and converts mechanical displacement into a change of resistance. c. Edge notches. The transducers are classified on the basis of the principle of transduction such as resistive, inductive, capacitive, etc. Which of the following improves sound transmission from the transducer element into the tissue? Active Transducers . (A) Current (B) Resistance (C) Inductance (D) All of the above. An ultrasonic transducer is made up of an active element, a backing, and wearplate. B Passive transducers. Report Errors. An example is the thermocouple; here, the fact that a current will flow in a continuous circuit of two metals, if the two junctions are at different temperatures, is used to generate electricity.… In this type of transducers, the input energy can be used as a control signal while transmitting energy using a power supply toward the proportional output. A Strain gauge. This transducer can be operated in conventional pulse-echo mode, with a performance similar to other conventional air-coupled transducers, or in a dual mode (transmit with the piezocomposite and receive with the active matching layer). Constantan is used for measurement of dynamic strains. B. In Active Transducers, the energy from the input is used as a control signal in the process of transferring energy from power supply to proportional output. ⇒ Which of the following is not valid integer variable in FORTRAN 77? which force oppertates … The transducer is of many types, and they can be classified by the following criteria. 4. 27 views 1 answer. SamVarghese SamVarghese Answer: Thermocouple is an active transducer. By transduction used. C. LVDT. A transducer is an electronic device that converts energy from one form to another. 1-Which of the following is not covered under Mechanical energy domain? D LVDT. But since the energy from the strained element is very small, the energy for the output is provided by an external power supply. And converts mechanical displacement into a change of resistance a backing, and antenna their operation represent! 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