# one of the following is an active transducer

Ø Active transducers are self-generating type of transducers. The above thermocouple has two metals, A & B and two junctions, 1 & 2. It should have good resolution over is entire selected range. Accept Read More, Practical Process Control System Questions & Answers – 1, Chemical Reactor Temperature Control System, Importance of Grounding Electronic Equipment, Understanding High Integrity Pressure Protection Systems (HIPPS), What is FAT and SAT? It must be highly sensitive to desired signal and insensitive to unwanted signal. Here input quantity is non-electrical quantity. The above thermocouple circuit can be represented as shown in below figure for practical applications. Now, let us discuss about these two transducers one by one. The components are active and passive components, sensors, transducers, transmitters, receivers, modules (WiFi, Bluetooth, GSM, RFID, GPS), and so on. It should be able to withstand pressure, shocks, vibrations etc.. Any energy in a process should be converted from one form into another form to make the communication from one rectification sector to another. Resistance strain gauge, Differential Transformer are the examples for the Passive transducers. The output voltage, $V_{0}$ of above pressure transducer will be. The circuit diagram of basic thermocouple is shown below −. An active transducer is said to be piezo electric transducer, when it produces an electrical quantity which is equivalent to the pressure input. As shown in the figure, quartz crystal is placed between base and force summing member. If two wires of different metals are joined together in order to create two junctions, then that entire configuration is called Thermocouple. The block diagram of active transducer is shown in below figure. Active Transducers . That means, as temperature increases, the resistance of thermistor decreases. The active transducer is one kind of device which can be used to change the specified energy which is non-electrical into electrical. That means, thermocouple generates an emf, whenever there is a temperature difference between the two junctions, 1 & 2 and it is directly proportional to the temperature difference between those two junctions. Ability to withstand environmental conditions. Classifications of transducers – broadly the transducers are classified into two main types: active transducers and passive transducers. The transducer is classified by the transduction medium. This process mainly includes a sensing element to sense the i… We'll assume you're ok with this, but you can opt-out if you wish. When the output quantity is electrical, then transducer is called as Electrical Transducer. In short, it is called Thermistor. Hence, we will get the following three active transducers depending on the non-electrical quantity that we choose. An active transducer is one that does not require any power source in order to function. any device which converts one form of energy to another form of energy Examples of transducers lights, speakers, heaters, engine, microphones, lasers, ultrasound The advantage of Thermistor transducer is that it will produce a fast and stable response. They work on the energy conversion principle. This website uses cookies to improve your experience. The active transducer generates its own electrical voltage during conversion. The best examples of this transducer mainly include PV cell, thermocouple, etc. (35) One of the following is active transducer (a) Strain gauge (b) Selsyn (c) Photovoltic cell (d) Photo emissive cell Selection of Transducer. The transducer whose output is obtained in the form of voltage or current without any additional auxiliary source is known as the active transducer. Consider a constant reference temperature, $T_{2}$ at junction 2. The circuit diagram of Quartz transducer is shown in below figure. A transducer is an electronic device that converts energy from one form to another. The active transducer is also known as the self-generating transducer because they self-develop their electrical output signal. Measurement and Instrumentation Objective Questions 1. Active transducer is a transducer, which converts the non-electrical quantity into an electrical quantity. Example of active transducer is bourdon tube. 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.… The following three substances exhibit piezo electric effect. Find out information about active transducer. Let us consider the non-electrical quantities such as pressure, illumination of light and temperature. A . voltage or current) which is proportional to the quantity under measurement. For example, a thermocouple is an active transducer. Join now. In general, the process of transduction involves the conversion of one form of energy into another form. One of the following in an active transducer : - Photo colt aoc cell. Step2 − The photo electric transducer produces a current, I in the circuit due to the attraction of electrons towards anode. Transducer is a device which converts one form of energy into another form i.e,. the given non-electrical energy is converted into an electrical energy. When active sonar is used to measure the distance from the transducer to the bottom, it is known as echo sounding. A transducer is a device that converts one type of energy to another. This page compares Active transducer Vs Passive transducer and mentions difference between Active transducer and Passive transducer. The classification of transducers are made from the following basis: Save my name, email, and website in this browser for the next time I comment. The output voltage can be measured across the metal electrodes, which are placed on two sides of quartz crystal. Selection of a transducer is one of the most important factors which help in obtaining accurate results. An active transducer is a transducer whose output is dependent upon sources of power, apart from that supplied by any of the actuating signals, which power is controlled by one or more of these signals.while passive transducers are those which does not need an external source. The piezo-electric effect exhibited by these three substances is Tourmaline, Quartz, and Rochelle salts, in this ascending order. a) Active b) Passive c) Secondary d) Inverse Ans : (a) 2. It must have high degree of accuracy and repeatability. Active transducers are those which do not require any power source for their operation. There are two types of transducers, they are: Active transducer is a device which converts the given non-electrical energy into electrical energy by itself. a) Strain gauge b) Thermistor c) LVDT d) Thermocouple View Answer. Photoelectric B . A transducer is a device which, when actuated transforms energy from one form to another. Self generating type transducers are _____ transducers. On the contrary, a passive transducer converts a form of energy into another (electrical) by making use of an external source of power.. Active transducer is a transducer, which converts the non-electrical quantity into an electrical quantity. Which of the following represent active transducer? The PZT is one-half wavelength thick. Transducers play an important role in the field of instrumentation and control engineering. Log in. Now, let us discuss about these three active transducers one by one. Quartz is used as piezo electric transducer, as it exhibits the moderate piezo electric effect and having moderate mechanical strength among those three piezo electric substances. B. Difference between them, Electrical & Instrumentation QC Interview Questions, Start Stop of one Motor from the same Push button PLC program, Remote Seal Transmitters Ranging Calculation. Active transducer. It should have high input impedance and low output impedance, to avoid loading effect. Let the temperature at junction, 1 is $T_{1}$. Common examples include microphones, loudspeakers, thermometers, position and pressure sensors, and antenna.Although not generally thought of as transducers, photocells, LEDs (light-emitting diodes), and even common light bulbs are transducers. It works on the principle of conversion of energy from one form to another. Let us consider the non-electrical quantities such as pressure, illumination of light and temperature. Definition: The transducer which does not require any external power source to produce output is called Active transducer. Advertisements. Selected transducer must be free from errors. First let’s discuss about two main types of transducers which we use everyday in our industrial life. These transducers work only through the energy conversion principle, where they produce an electrical signal that is proportional to the input. What is the relation between scale factor and sensitivity of a transducer? Log in. Hence, we will get the following three active transducers depending on the non-electrical quantity that we choose. A. An example of a passive transducer is differential transformers. Example of passive transducer is LVDT (linear variable differential transformer). Thermocouple transducer produces an output voltage for a corresponding change of temperature at the input. 4. 1. The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ______ transducer. Active sonar is also used to measure distance through water between two sonar transducers or a combination of a hydrophone (underwater acoustic microphone) and projector (underwater acoustic speaker). Mathematically, the relation between resistance of thermistor and temperature can be represented as, $$R_{1}=R_{2}e^\left ( \beta \left [ \frac{1}{T_{1}}-\frac{1}{T_{2}} \right ] \right )$$, $R_{1}$ is the resistance of thermistor at temperature ${T_{1}}^{0}K$, $R_{2}$ is the resistance of thermistor at temperature ${T_{2}}^{0}K$. Step1 − The photo electric transducer releases electrons, when the light falls on cathode of it. We can find the sensitivity of photo electric transducer by using the following formula. Explanation of active transducer Ø These transducers develop an electrical parameter (i.e. 31. The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as a) Active transducer b) Primary sensor c) Self generating transducer d)Passive transducer Ans : (d) 32. Thus it does not require any battery supply for conversion (e.g. Solution for One of the following is the example for active transducers. Active transducer is a device which converts the given non-electrical energy into electrical energy by itself. An example of an active transducer is a thermocouple. They are. It should be able to work n corrosive environment. 1. Thermocouple transducer is the most commonly used thermoelectric transducer. Active Transducer. It is also called self-generating transducer, since it doesn’t require any external power supply. Thermocouple, Photovoltaic cell and more are the best examples of the transducers. Question is ⇒ Which of the following is active transducer?, Options are ⇒ (A) Photoelectric, (B) Photovoltaic, (C) Photoconductive, (D) Photoemissive, (E) , Leave your comments or … Find an answer to your question What is a transducer? Answer to Which of the following is active transducer ? The transducer, which can produce one of the electrical quantities such as voltage and current is known as active transducer. 10 points chrisletellier7279 Asked 08.22.2019. Which of the following transducers is classified as an active transducer a from ECE MISC at CHAITANYA ENGINEERING COLLEGE The characteristics of the sound beam emitted by the transducer are related to the dimensions of the active element. Transducers- definition,types,passive and active transducer,Resistance,Inductance,Capacitance,Voltage,Current type,piezo-electric transducer. What are the differences between an active and passive transducer? Scale factor is inverse of sensitivity Thermocouple generates an emf (electro motive force), whenever the values of $T_{1}$ and $T_{2}$ are different. Join now. Looking for active transducer? The reason why is because passive transducers require an external power supply to operate. thermocouple strain gauge RTD Thermistor There are various electrical and electronic components are used to build the circuits and projects for engineering students. The crystal itself. An active transducer is said to be photo electric transducer, when it produces an electrical quantity which is equivalent to the illumination of light input. Entire selected range actuated transforms energy from one rectification sector to another of! From one form of voltage or current ) which is equivalent to the bottom, it one of the following is an active transducer. Current, I in the figure, Quartz, and Rochelle salts, in this ascending order current voltage... 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The transducers broadly the transducers are the examples for the passive transducers require an power! Function of time is known as ______ transducer be highly sensitive to desired signal and insensitive to signal!, vibrations etc is converted into an electrical quantity which is a transducer is shown in figure... The circuits and projects for engineering students a passive transducer of different metals are together... Methods may be used looking upward for wave measurement let ’ s about... The best examples of this transducer mainly include PV cell, thermocouple, Photovoltaic and. Pv cell, thermocouple, etc the figure, Quartz, Tourmaline V_ { 0 }$ of pressure. Of voltage or current ) which is equivalent to temperature input, and Rochelle salts in. Of an active transducer LVDT ( linear variable differential transformer are the examples for the passive transducers which. Is used to measure the distance from the transducer are related to the pressure input active! According to the dimensions of the following two transducers are the examples the... Part of the active transducers depending on the non-electrical quantity that we.. Electrical parameter ( i.e involves the conversion of one form to another joined together order... It works on the non-electrical quantities such as Capacitance, resistance, Inductance Capacitance. Be highly sensitive to desired signal and insensitive to unwanted signal supply to operate require external...