Eg: Photovoltaic cell Passive Transducer The transducer which requires an external excitation to provide their output is referred as passive transducer. Capacitors are also called a condenser. Electrical4U is dedicated to the teaching and sharing of all things related to electrical and electronics engineering. Inductive distance sensors (AlphaProx) are based on the same measuring principle as inductive proximity switches. This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Inductive Transducer”. a) directly proportional d) rydberg constant The transduction element of capacitive transducer is a capacitor which may be a parallel plate, cylindrical or angular capacitor. b) L = 1⁄S The linear variable differential transformer (LVDT) (also called linear variable displacement transformer, linear variable displacement transducer, or simply differential transformer) is a type of electrical transformer used for measuring linear displacement (position). d) S = 1⁄μA View Answer, 7. c) 4 How does the value of mutual inductance vary between two coils of an inductive transducer? The transformer present in above circuit has a primary winding and two secondary windings. Inductive Transducer •When a force is applied to the ferromagnetic armature, the air gap changes, varying the reluctance of the magnetic circuit. Capacitive transducers. d) self-inductance To practice all areas of Electrical Measurements, here is complete set of 1000+ Multiple Choice Questions and Answers. Inductive Eddy Current: Inductive eddy current sensors operate by generating a high frequency electro-magnetic field about the sensor coil which induces eddy currents in a target material. Inductive transducer is used for the measurement of physical quantities. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. b) S = 1⁄μ The inductive type consists of a Linear Voltage Differential Transformer (LVDT) where core is positioned by the pressure through a diaphragm or a bellows element as shown in the figure below.. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. © 2011-2020 Sanfoundry.  It measures force in terms of displacement of ferromagnetic core of a transformer. Transducers and Inverse Transducers- -A Transducer can be broadly defined as a device which converts a non-electrical quantity into an electrical quantity. Thus inductance of coil varied with the variation of distance between coil and plate. We know that when a conducting plate is placed near a coil carrying alternating current, a circulating current is induced in the plate called “EDDY CURRENT”. There are mainly three types of electrical pressure transducers – inductive, resistive, and capacitive. a) M = k$$\sqrt{L_1 L_2}$$ b) inversely proportional This can be done by changing the flux with the help of measured and this changing flux obviously changes the inductance and this inductance change can be calibrated in terms of measured. a) True View Answer, 8. Ex:-Resistive,inductive and capacitive transducers -An inverse transducer is defined as a device which converts an electrical quantity into a … Actually what happens? Particularly inductive transducer is used for the detection of type of metal, finding missing parts or counting the number of objects. Here, the ending points of two secondary windings are joined together. measurand. A counterpart to this device that is used for measuring rotary displacement is called a rotary variable differential transformer Inductive sensors measure inductance variations caused by movement of a flux-concentrating element. This principle is used in such type of inductive transducers. View Answer, 3. The working of these sensors can be done by generating an oscillating electromagnetic field which is formed by a magnetic object when it is in motion. Resistive transducers. When the mechanical element whose displacement is to be calculated is moved, then it will change the flux path’s permeance which is generated from the circuit. The resistive transducer is used for measuring the physical quantities like temperature, displacement, vibration etc. a) S = 1⁄A 2. d) permittivity of air They are also able to measure the thickness or density of non-conductive materials. You measure this using a voltmeter with the black test lead on 0V (common) and the red test lead on the BK (output) of the sensor and the meter set to measure DC Voltage. b) M = k$$\sqrt{L_1}$$ The magnitude of variation corresponds to the intensity of the pressure. The stimulus being measured- Based on application. 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