Passive and Active transducers; Analog and Digital transducers; Transducers and Inverse transducers . Active Transducers; Passive Transducers; Now, let us discuss about these two types of transducers briefly. 5. Active device and converts mechanical displacement into a change of resistance. d Coupling medium. Active Transducers; Passive Transducers; Active Transducers. 27 views 1 answer. Ø These transducers develop an electrical parameter (i.e. Strain gauge. Size: The transducer should have smallest possible size and shape with minimal weight and volume. D LVDT. 4. (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? 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. B Passive transducers. Usually a transducer converts a signal in one form of energy to a signal in another. A. 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. 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. Which of the following represent active transducer? c. Edge notches. Which of following represent active transducer? 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 The active element is a piezoelectric or single crystal material which converts electrical energy to ultrasonic energy. D. None of the above. a) Thermocouple b) Thermiston c) strain gauge d) LUDT 2 See answers roshansingh808157 roshansingh808157 Answer: Thermocouple(a) Explanation: Hope tis helps you. 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. The transducer, which can produce one of the electrical quantities such as voltage and current is known as active transducer. solar cell, thermocouple etc.). which force oppertates … Compare active transducer with passive transducer based on working principle, example, advantage, application. C. LVDT. Alternatively, a transducer is defined as a device which provides usable output response to a specific input measured which may be a physical quantity. Direct the sound out of the transducer B. For example, a Strain Gauge is an Active Transducer, in which the strain is converted into resistance. Although not generally thought of as transducers, photocells, LEDs (light-emitting diodes), and even common light bulbs are transducers. D Primary transducers. The electrical energy pulse is generated from an instrument such as a flaw detector. b Doppler effect. D. Thermocouple. Passive device and converts electrical displacement into a change of resistance . Which of the following improves sound transmission from the transducer element into the tissue? 4. The classification of transducer-based on the source of energy can be done through two types which include the following. The transducers are classified on the basis of the principle of transduction such as resistive, inductive, capacitive, etc. Ø Active transducers are self-generating type of transducers. It will also then receives back ultrasonic energy and converts it to electrical energy. Classification of Transducers based on transduction Principle. The applications of transducers based on the electric parameter used and the principle involved is given below. 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. B Encoder. Which of the following is a digital transducer? The transducer is of many types, and they can be classified by the following criteria. A shear waves c. A surface wave d. A lamb wave. A transducer is a device that converts energy from one form to another. Frequency C. Hertz D. It is an alloy of A. Derive:- Energy = Magnetic fields × Length of conductor. 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. View Answer Answer: Analog transducers 16 Which of the following is a digital transducer? a. Flat bottom holes. D. Active device and converts electrical displacement into a change of resistance View Answer / Hide Answer. C Analog transducers. Other articles where Active transducer is discussed: transducer: The active transducers generate electric current or voltage directly in response to stimulation. A. 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. Based on whether the transducer is active or passive. On the contrary, a passive transducer converts a form of energy into another (electrical) by making use of an external source of power.. (A) Distance (B) Latent heat (C) Force (D) Size. 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.). Transducer Applications. No Solution. B. The active elements of the diagnostic ultrasound transducer. Classifications of transducers – broadly the transducers are classified into two main types: active transducers and passive transducers. 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.… B. There are many active elements, which are firing at almost the same time in a mechanical scanner. For a closed loop controlled d.c. drive, current limit control (CLC) is normally employed. voltage or current) which is proportional to the quantity under measurement. Active Transducers. 1-Which of the following is not covered under Mechanical energy domain? True. A duplex scanner. By transduction used. ⇒ Which of the following is not valid integer variable in FORTRAN 77? 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. B. Thermistor. A. Following transducer is an active transducer: Which one of the following is not a transducer in the true sense? Q5. a may be crystalline material. b. c convert electrical energy into mechanical energy. Which of the following waves is only able to travel through a thin section of material? C Thermistor. An ultrasound unit, which can display two-dimensional images and A mode at the same time, is called . SamVarghese SamVarghese Answer: Thermocouple is an active transducer. Mainly, the electrical transducers can be classified into the following two types. 1. The wave shape of input current is dc sinusoidal rectangular none of the above B. The electromagnetic transducer is self-generating active transducers. 3. Side drilled holes. Objective Question. The speed of response of the transducer should be as high as practicable. d. All of the above. In this case, sensitivity is reduced but other advantages, as the reduction of the transducer dead zone for pulse-echo operations, can be achieved. An ultrasonic transducer is made up of an active element, a backing, and wearplate. 1. 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. Active Transducers . The active transducer generates its own electrical voltage during conversion. In passive transducer, it requires externalbattery supply. Position . (A) Current (B) Resistance (C) Inductance (D) All of the above. 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 5. a) Strain gauge b) Encoder c) Thermistor d) LVDT Ans : (b) 5. False. This is the first type of classification of a transducer. Inductive transducer: Wave speed B. 61) The purpose of the backing material in a transducer is to: A. 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. A. B. 10. Question:14. Speed of Response: It is the rapidity with which the transducer responds to changes in the measured quantity. 4. Active Transducer A transducer which requires energy to be added, for example a photo resistor. Thus it does not require any battery supply for conversion (e.g. A Active transducers. c Damping material. 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). 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. Report Errors. 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. Resistance Variation Type. Ø They can be subdivided into the following commonly used types . Which of the following is most important in the determination of the frequency of the sound? asked Apr 14, 2018 by anonymous. Ø These transducers do not require any external source or power for their operation. With a phased array scanner, there are many active elements which are being … Passive Type Transducers. 2-Which of the following form the basis of Electrical domain? 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. 0 like 0 dislike. Which transducer is known as ‘self-generating transducer’? Strain gauge is a . But since the energy from the strained element is very small, the energy for the output is provided by an external power supply. Common examples include microphones, loudspeakers, thermometers, position and pressure sensors, and antenna. A commpound scanner. Classification of transducers. New questions in Physics . Constantan is used for measurement of dynamic strains. a Matching layer. C. A C mode scanner. Artificial flaws can be produced by using: a. a. A Strain gauge. a) Strain gauge b) Thermistor c) LVDT d) Thermocouple View Answer. A transducer is an electronic device that converts energy from one form to another. ANSWER: C. 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