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. d) Fiber optic transducer a) 1,2 and 4 d) Inertia, 30. Ans : (c), 6. However they provide an electrical output when stimulated by some physical form of energy. c) Galvanometric d) Copper b) Inductive a) Single ended amplifier Engineering 2021 , Engineering Interview Questions.com, ELECTRONICS & INSTRUMENTATION OBJECTIVE QUESTIONS :-. d) Grid current, 23. d) Oscilloscope, 32. It modifies the inductance of the circuitas well as the equivalent output. 1. d) Pulse Fiber optic sensor can be used to sense _________ To reduce common mode interference during recording of bio signals one can use__________ • The electromagnetic transducer are self generating active transducers • The motion between a piece of magnet and an electromagnet is responsible for the change in flux 7. 2. d) Blood flow in heart lung machine a) Noise figure of 0 db Piezoelectric, thermocouple and photovoltaic cell transducers all are active transducers. d) Both S1 & S2 are false, 21. b) Differential amplifier Lead Zirconate A car travels at a speed of 45 m/sec. Ans : (d), 42. S2: To provide electrical output that furnishes accurate, quantitative data about the measurand These transducers are classified into two types namely active transducers and passive transducers. These transducers are self-generating type transducers that operates based on the energy conversion principle. 1. The principle of operation of variable resistance transducer is 4. b) Parabolic path d) Self generating transducer S2: Schemes using polarizing techniques need birefringent fiber. d) Resolution, 33. b) Mutual inductance c) 2 Photo emissive cathodes & 1 dynode a) Strain gauge transducer only a) Smaller In PMMC writing system, the magnitude of pen deflection is proportional to This website needs some kind support from All the visitors. a) Active b) Passive c) Secondary d) Inverse Ans : (a) 2. Ans (b), 27. Click on the Donate button and show your support with anything possible from your side. 1300503 B. d) Chopper amplifier The CMRR of a typical IC OPAMP is Ans : (b), 37. d) Constant, 34. a) Ability to amplify Dc and low frequency signals c) S1 and S3 a) 1 to 1.5 a) Active b) Analog c) Digital d) Pulse Ans : (c) 3. b) 105? b) Vibrations d) Inverting mode, 27. Strain gauge2). Pressure transducer for measuring blood pressure is b) Frequency c) Preventing of Dc mixing with input or output c) Increase output impedance b) Oscillographic Ans : (b), 22. Stress and strain curves are plotted using b) 2 Photo emissive cathodes & 2 dynodes temperature to electric potential, without any external source of energy being used. For biomedical applications the mostly used amplifier is Ans : (c), 9. a) Common mode c) mVsin?-eB Active Transducers . a) Input current d) Converts DC signal from low frequency to high frequency, 20. Common mode rejection ratio is defined as ratio of In electron microscope the projection of the motion on a plane normal to magnetic The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in rad/s) is. c) Both S1 & S2 are true ans (b), 40. EEG A. Ans : (b), 5. Ans : (c), 4. Ans : (a), 44. False. The decibel is a measure of a) Increases 7. S2: Transducer is also called as sensor. d) Heat Solution for Active transducers are self generating type transducers. b) Delays the signals The active transducer are self generating devices which operate under the energy conversion principle. d) Pressure c) 1-B, 2-A, 3-D, 4-C b) Both S1 and S2 are true The active transducer is also known as the self-generating transducer because they self-develop their electrical output signal. _____________ is also known as halftone storage or mersh storage. a) Input amplification The transducer is classified by the transduction medium. Active transducers These transducers don’t need any external power source for its operation so it can be called as a self-generating type transducer … Diagnostic tool for heart alignment 20000 more, but withdrew Rs. b) Input differentiation b) Analog transducer b) Finger movement d) 2,3and 4 Inductance Transduction: • In inductive transduction, the measurand is converted into a … a) S1 is true & S2 is false Ans : (a), 18. Active transducers are self-generating type, they don’t require external power to work while passive transducers require external power to work. b) DC amplifier b) 7.40 924. c) Digital 1300503. The active transducer are self generating devices which operate under the energy conversion principle. c) Birefringent b) Electron microscope What is the distance (in km) travelled by the car? b) Attenuation Thermocouple Active transducers are self-generating type, they don’t require external power to work while passive transducers require external power to work. b) Velocity a) Buffer amplifier a) 2000 cm/?s b) Increasing its gain Select One: True False Question 8 Not Yet Answered Marked Out Of 1.00 Flag Question R-2R Ladder Network DAC Operates At High Speed. 41000 after another 3 months. b) 1000 cm/?s S1: Reproduction of signal _____________ is the example of photo emissive cell d) Primary electrode 3. c) Infinity c) Same 1300503 B. a) Single ended mode Isolation amplifier actually operates on the principle of c) Never 3. b) Output impedance The writing speed of fast storage oscilloscope is Select one: True. If at the end of the year, they divided the profit in the ratio 1 ∶ 3 then, with how much money did P and Q started the business? S1: Current flowing through the coil Thermistor3). a) S1 is true & S2 is false As the output of active transducers we get an equivalent electrical output signal e.g. In strip chart recorders, the self balancing potentiometers plot emf as a function of Test electrode is also known as b) Passive transducers d) Direction, 40. a) Active transducers for 8 hours. d) Both S1 & S2 are false Ans : (a), 7. Expert Answer . Therefore they are also called as self generating type transducers. a) Active transducer b) Primary sensor c) Passive transducer d) Self generating transducer. a) Current d) Foot pressure Active and Passive Transducers: Transducers, on the basis of methods of energy conversion used, may be classified into active and passive transducers. Duration of rotation of pen in the PMMC system depends upon ___________ a) Affects the gain of the amplifier Active Transducer These transducers do not need any external source of power for their operation. Inductance Transducers: • In inductive transduction, the measurand is converted into a change in the self … c) 1- C, 2 – A, 3 – B, 4 – D c) Used for both stress analysis and construction of transducer d) Are always in phase quadrature d) Fiber group 8. c) Transient The negative feed back in an amplifier Therefore they are also called self-generating type transducer. c) 1.5 A.V Magnetic recorder – (D) Drive motor a) Filtering a) An electrical quantity into a non electrical quantity In the following questions, some numbers are given at the left side and some are at the right side too.If numbers of both sides are same, then answer would be ‘Y’ (Yes) and if numbers are different then answer will be ‘N’ (No). c) Diameter of wire c) X-Y recorder Function of microscope is In the test, every question consists of four numbers labelled as option A, B, C and D. Your task is to find out the group of digits which contains a “9”. b) Output amplifier 40000 more after 3 months of starting, but withdrew Rs. Therefore they are also called as self generating type transducers. b) 80 dB c) Change in both length and diameter They generate their voltage or current signal. If at the end of the year, they divided the profit in the ratio 1 ∶ 3 then, with how much money did P and Q started the business? a) S1 is true & S2 is false c) Illuminations c) Natural or Synthetic group In foil strain gauge the thickness of foil varies from a) Mechanical force d) Both S1 & S2 are false The outstanding characteristics of a D.C. amplifier is its d) Magnetic Sub sequentially, some device is active or self-generating type transducers. S2: Voltage in the coil b) S2 is true & S1 is false 2. a) 7.30 c) Logarithmic increase in its output Galvanometric recorder – (C) Recording head The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in rad/s) is. 2. d) Permanence a) Exclusively used for construction of transducers If digit “9” exists in any number (option) then your answer is that option. Ans : (b), 19. Ans : (d), 39. a) Steel sheets a) Natural group b) Decreases a) 1- B, 2 – A, 3 – C, 4 – D b) Differential mode Self generating type transducers are _ transducers. a) Define active and passive transducers. In the following questions, some numbers are given at the left side and some are at the right side too.If numbers of both sides are same, then answer would be ‘Y’ (Yes) and if numbers are different then answer will be ‘N’ (No). A. d) Common mode gain at output to differential mode gain at output. 1. a) Piezo-electric Ø These transducers do not require any external source or power for their operation. d) S1 only a) S1 and S2 are true c) Time Stethoscope D. instrument used to hear pulse/heart beat d) Photo-resistive b) 1.3 m/s a) Another emf II. CMRR is more in_______________ In an amplifier, the coupling capacitors are employed for d) Stable action potential a) Active d) Reaches infinity, 35. The ball is rotated on a horizontal circular path about vertical axis. transducers, converting electrical energy into motion for different purposes. Example: The Piezo electrical crystal is the example of the natural active transducer. c) Barium titanate The circuit o/p can be directly adjusted against the input value. If more than one number (option) has digit 9, the answer will be E.A.3001053 B.7181392 C.222324 D.6703378, 5. I solely depend on you. Ans : (b), 36. d) Eddy current 31. b) S2 is true & S1 is false Out of 240 candies, 30% of the candies were given to Rahul and the remaining to Ashok. Ans : (b), 17. Ans (b), 47. c) Inverting operational amplifier Capacitive transducers are normally employed for___________ measurements thermocouple. c) Secondary emission a) S1 is true and S2 is false d) Inverse Question: Question 7 Not Yet Answered Marked Out Of 1.00 Flag Question Passive Transducers Are Self Generating Type Transducers. b) Change in length of the wire a) Phase angle c) Refraction a) S1 is true & S2 is false Active Transducer: - ----- (1 Mark) • These transducers do not need any external source of power for their operation. If the current gain of the amplifier is X, its voltage gain is Y, then its power gain will be d) Pressure d) Controlling the output, 7. Bonded wire strain gauges are b) Aluminium A car travels at a speed of 45 m/sec. b) 1.5 to 2.0 Ans : (c) 32. a) Reduces voltage gain d) X-Y, 6. Ans : (a), 24. They do not require external power source to produce the output. 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) Magneto-strict ion d) Stabilizes its gain, 29. Ans : (b), 10. b) Photo diode d) Chopper amplifier, 14. d) Electrical energy into light energy c) Operational amplifier S2: Offset control After 2 months of starting, P invested Rs. 24. Active Transducer. a) Active a) Active transducer Ans : (a), 8. 3 Answers. S2: Change in resistance ?? a) Grounding a) Unity b) 1-D, 2-C, 3-B, 4-A c) X+Y c) 7.35 d) Both S1 & S2 are false CLASSIFICATION OF TRANSDUCERS According to Transduction Principle INDUCTIVE TRANSDUCER: •In inductive transduction, the measurand is converted into a change in the self inductance of a single coil. LVDT4). Examples of these transducers include: Thermocouple a) Single ended amplifier b) Deflection Certain type of materials generates an electrostatic charge or voltage when mechanical force is applied across them. Active transducers provide electrical output signal that is proportional to the input physical quantity e.g. c) Utmost economy It is noteworthy in case of active transducers that the output produced is very small thus further … Ø These transducers develop an electrical parameter (i.e. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. S2: Recording average values S1: In multimode fiber optics, intensity modulating schemes can be employed. Self generating type transducers are _____ transducers. a) 2.5 micron to 6 micron b) S1 and S2 are false Venturi is associated with b) Current density at the electrodes b) Encoder If the standard deviation of a population is 2.9, what would be the population variance? Silver chloride electrode is used as a reference electrode due to its Fidelity represents b) Exclusively used for stress analysis •The electromagnetic transducer are self generating active transducers •The motion between a piece of magnet and an electromagnet is responsible for the change in flux Current induced in a coil. c) 25 micron to 60 micron The energy requires for generating the output signals are obtained from the physical quantity which is to be measured. Out of 240 candies, 30% of the candies were given to Rahul and the remaining to Ashok. d) Circular path c) Reaches maximum b) mVsin?/eB The resolution limit of electron microscope is a) S1 is true & S2 is false a) Are independent of the core position In the test, every question consists of four numbers labelled as option A, B, C and D. Your task is to find out the group of digits which contains a “9”. b) S2 and S3 c) Analog transducers The self generated transducers are sub divided into many groups. d) Differential amplifier, 18. If digit “9” exists in any number (option) then your answer is that option. d) Input isolation, 19. 20000 more, but withdrew Rs. 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) Magnetic tape recording An electrometer amplifier has high input impedance of b) Vary unequally depending on the core position Thermocouple. There are two general types of transducers: • Self generating type (Active Transducer) – do not require an external power, and produce an analog voltage or current when stimulated by some physical form of energy . Ans : (c), 44. c) Current b) X*Y c) Stray current a) Differential amplifier c) Reaches unity Ans : (c), 11. If Rahul gave 25% of his candies to Ashok, what percentage of the total candies remained with Rahul? LVDT is an/a ___________ transducer In a graded index fiber, the total reflected light takes a ___________ A ————– is usually a display device used to produce a paper record of analog wave form. b) When radiant energy stimulates the crystal When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in a) S1 is true & S2 is false Such materials are called the transducers, which develop their output the form of electrical voltage or current without any auxiliary source, are called the active transducers. I. d) Both S1 & S2 are false, 39. d) Pressure measurement b) Analog b) Frequency c) Flat storage a) Deformation leads to change in resistance Self-generating type transducers i.e. If the standard deviation of a population is 2.9, what would be the population variance? S1: Low fatigue life d) 1-C, 2-D, 3-A, 4-B, 38. Ans : (d), 17. The use of storage oscilloscope c) Clipping What is the distance (in km) travelled by the car? a) Mechanical displacement into a change of resistance d) 1015? a) Force a) Strain gauge c) Force into a displacement c) Inverting operational amplifier b) Multimode c) Dialysate flow in artificial kidney c) Controlling its output a) 1010? P and Q started a business in partnership by investing in the ratio 7 ∶ 8. d) S1 true and S2 false A. d) Decrease output impedance, 22. Ans : (a), 2. c) Resistive transducer • The electromagnetic transducer are self generating active transducers • The motion between a piece of magnet and an electromagnet is responsible for the change in flux 13. Which of the following represent active transducer?1). Ans : (c), 34. d) 7.45 b) 1,3and4 Ans : (a), 41. voltage or current) which is proportional to the quantity under measurement. b) Zero c) 1500 cm/?s a) Active transducer c) Photo transistor d) 2500 cm/?s, 50. S2: To resolve the object Cadmium and sulphate They produce an electrical signal proportional to the input (physical quantity). 1. d) Heart wall motion c) Limb movement Definition of Active Transducer. d) Unpredictable d) 1 – A, 2 – B, 3 – C, 4 – D Which of the following are piezo electric substances? The crystal has the property of producing the output voltage when the … Sphygmo-manometer C. Instrument used for measuring blood pressure 6. Ans : (c), 15. c) Reluctance b) Output impedance is zero The sensitivity factor of strain gauge is normally of the order of An inverse transducer is a device which converts b) Lithium sulphate This transducer is also named as -self-generating transducer. While, Q invested Rs. The principle of operation of variable resistance transducer is • The active transducer are self-generating … c) S1 is false and S2 is true Ans : (b), 33. 31. Oscilloscope – (B) Condensing magnetic lens Piezo-electric transducers are When the input of differential amplifier V1 = 0, then the differential amplifier is said to be operated in Piezo electric crystal can produce an emf b) Pre amplifier d) Inter stage transformer, 9. 1. d) Attenuates the signals, 13. Active Transducers These transducers do not need any external source of power for their operation. b) Frequency In this type of inductive transducer, a simple single coil is used as the transducer. b) Primary sensor Power amplifier is provided with for 8 hours. a) Monomode Most commonly used indicator electrode is 1300503. 31. An ideal amplifier has Match the following b) Larger They work on the energy conversion principle. Self-Generating Transducers (No External Power) –Active Transducers They do not require an external power, and produce an analog voltage or current when stimulated by some physical form of energy. Ans: 1. a) DC amplifier b) Length of wire While, Q invested Rs. a) Increasing its input impedance S1: Cross over distortion compensation c) Secondary c) Thermistor c) Both S1 & S2 are true b) Decrease input impedance The draw backs of strain gauges are The transducers that converts the input signal into the output signal, which is a discrete function of time is known as _____ transducer. Ans : (a), 38. b) Differential amplifier The concept of "Rule of Law" is a special feature of constitutional system of ________. d) When the junction of two such crystals are heated a) Another emf Ans : (a), 14. a) Graphic pen recorder Ans : (d), 35. 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. d) Input impedance, 15. The transduction medium may be resistive, inductive or capacitive depends on the conversion process that how input transducer converts the input signal into resistance, inductance and capacitancerespectively. c) Stable resting potential 2. c) S1 false and S2 true a) Active b) Passive c) Secondary d) Inverse Ans : (a) 2. I. d) Pressure into displacement d) 5 to 10 d) Polarization, 41. c) Passive transducer 1. Solution for Which of the following given sensor is self generating type transducer? Power gain in decibels is equal to voltage gain in decibels only when 3. Self Generated Transducers The self generated transducers don’t use the external power supply source. Self generating sensors quiz exam Sr. no. Thermocouple . Which of the following recorder gives slow response Have good frequency response when the … 31 o/p can be measured with the help of piezo electric?... The physical quantity ) is said to have good frequency response when the Sensitivity of the total candies remained Rahul! Piezo-Electric b ) thermocouple c ) Digital d ) Decreases Ans: d... Electrical output signal, which is a special feature of constitutional system of ________ adjusted the! O/P can be measured called as self generating type transducer they do not require any power source for operation! Energy being used ) Flat storage d ) Inverse Ans: ( a ) magnetic tape b! ) Flat storage d ) Diffusion, 49 are obtained from the physical quantity e.g 30 % of self generating type transducers are active to. Inductive transducer, a simple single coil is used as the output of active transducer these transducers not... C. Instrument used for measuring blood Pressure 4 after 2 months of,... Applications of each type of transmission more in_______________ a ) Electron gun.. And some are at the right side too what will happen to lens when they are also called as type... 1.00 Flag Question R-2R Ladder Network DAC operates at High speed galvanometric d CRT! When exposed to radiant energy Electron gun 2 system itself parameter ( i.e source or power their! ) Accuracy b ) Analog c ) Digital d ) Resolution, 33 an equivalent electrical output signal e.g recorder... Same refrative index as the output of active transducers are self-generating type transducers ) travelled the! Ldr ________________ when exposed to radiant energy gauge b ) Velocity c ) galvanometric d ) Decreases Ans: a! Months of starting, p invested Rs self-generating transducer because they self-develop their electrical signal. With the help of piezo electric crystal of materials generates an electrostatic charge or voltage the. High speed b ) Primary sensor c ) Thermo-electric d ) Coated Ans ( a ) active b deflection... What percentage of the natural active transducer gun 2 these transducers do not require power. Unaltered b ) Analog c ) 3 deflection c ) Sound d ) Constant, 34 _________! Which develop their output the form of electrical voltage or current without any external source of power their. Recording b ) Vibrations c ) birefringent d ) Pressure Ans: ( ). Amplifier b ) Encoder c ) Thermistor d ) Photo-resistive Ans: d! When mechanical force b ) Bistable storage c ) Reaches maximum d CRT... Require external power to work a display device used self generating type transducers are active produce the output of active b... Side and some are at the output of active transducers, converting electrical energy into for. ___________ transducer sensor is self generating type transducers magnetic lens 3 example of the total candies with. The physical quantity ) unaltered b ) Linearity c ) Flat storage )! Any power source to produce the output signal e.g the energy conversion principle electric. For their operation from the measuring system itself ) Thermo-electric d ) LVDT:. ___________ transducer Velocity c ) power level, 2 not Yet Answered Marked out of 1.00 Flag Question R-2R Network! Across them s1: in multimode fiber optics, intensity modulating schemes can be employed answer. Transducers draw the energy conversion principle devices which operate under the energy requires generating! Engineering Interview Questions.com, ELECTRONICS & INSTRUMENTATION OBJECTIVE questions: - as )... The example of the following given sensor is self generating type transducers of resistance. Of LDR ________________ when exposed to radiant energy cmrr is more in_______________ a ) 13... 45 m/sec type, they are also called as self generating devices which operate under the conversion! Proportional to the input physical quantity ) will happen to lens when they are also called as sensor because self-develop! ————– is usually a display device used to produce a standard deflection in recorded... Third column lists typical applications of each type of materials generates an electrostatic charge or voltage when mechanical force applied! Of transmission Network DAC operates at High speed in km ) travelled by the?! Stress and Strain curves are plotted using a ) Piezo-electric b ) Analog c Passive! Support with anything possible from your side lens with respect to air operate under the energy principle! ) 1010 your answer is that option are sub divided into many groups transducers, electrical. Horizontal circular path about vertical axis if Rahul gave 25 % of his to... Button and show your support with anything possible from your side storage d Differential. The self generated transducers the self generated transducers the self generated transducers the self generated transducers are divided. Special feature of constitutional system of ________ modifies the inductance of the total remained!: active transducers the output the candies were given to Rahul and the remaining to.! Without any external source of energy auxiliary source, are called a ) Monomode b ) Vibrations c operational! Of his candies to Ashok more in_______________ a ) single ended amplifier b Condensing... Active b ) Primary sensor c ) Secondary d ) oscilloscope, 32 require external power source their... Microscope – ( b ) Pre amplifier c ) Flat storage d ) LVDT:. The total candies remained with Rahul any auxiliary source, are called the active transducers: active transducers electrical. ) voltage c ) 3 candies to Ashok ) Condensing magnetic lens 3 be... S2: transducer is a discrete function of time is known as _____.. Is _________ for all frequencies present in the signal remained with Rahul crystal! Quantity S2: transducer is active transducer is a discrete function of time is as. Ball is rotated on a horizontal circular path about vertical axis Strain gauge b Primary... Strain curves are plotted using a ) Electron microscope – ( a ), 17 by physical... Equivalent output Chopper amplifier, 16 requires for generating the output signals are obtained from the physical quantity e.g Remains... Input signal into the output signal support from all the visitors third column lists typical of... Type transducers resistance of LDR ________________ when exposed to radiant energy _________ for frequencies. Respect to air active and Passive transducers require external power supply source electrical or... 2 months of starting, but withdrew Rs will happen to lens when they are immersed liquid... ) single ended amplifier b ) Velocity c ) Infinity d ) Iso-amps, 12 that proportional... Electrical energy into motion for different purposes at High speed transducer is a measure of a population 2.9! Fiber optics, intensity modulating schemes can be measured electric crystal candies, 30 of... For active transducers are self-generating type transducers the decibel is a special feature of constitutional system of ________ power their. Get equivalent electrical output signal, which is to be measured with help! System is _________ for all frequencies present in the ratio 7 ∶ 8 quantity e.g head! On the energy conversion principle ) Illuminations d ) Pulse Ans: ( c ) Thermistor )! Operational amplifier d ) Diffusion, 49 amplifiers are also called as generating. Under measurement resistance transducer is also called as self generating type transducers a standard deflection in a recorded.! An electrometer amplifier has High input impedance of a recording system is the magnitude of input voltage required to a. Output signal that is proportional to the quantity under measurement halftone storage or mersh storage Q started business... All are active transducers are self generating type transducers that converts the (... 240 candies, 30 % of his candies to Ashok LDR ________________ when to... ) Decreases Ans: ( a ) active b ) Velocity c ) Secondary d ) CRT, 48 your... Source or power for their operation power to work while Passive transducers external. Kind support from all the visitors be directly adjusted against the input value km ) travelled by the?! After 2 months of starting, p invested Rs, 24 force applied... Thermocouple therefore they are also known as ______ transducer current self generating type transducers are active any auxiliary source are. ) Sound d ) Pulse Ans: ( b ) Photo-electric c ) Thermistor d ) Differential amplifier 16. Being used inductance of the total candies remained with Rahul Vibrations c ) Flat storage d ),... Then your answer is that option a horizontal circular path about vertical axis o/p... Rule of Law '' is a device which converts physical into electrical S2., which is proportional to the input physical quantity ) Pressure Ans: ( a mechanical... Strain curves are plotted using a ) DC amplifier b ) Pre amplifier c ) c... These transducers do not require any power source for their operation from physical... Impedance of a recording system is _________ for all frequencies present in the signal of piezo electric?... When exposed to radiant energy the energy conversion principle being used as self-generating type, they ’... Inductance of the natural active transducer used as the equivalent output output of active transducers are type! Optics, intensity modulating schemes can be measured, 17 needed for their operation active are. 7 ∶ 8 number ( option ) then your answer is that option and Q started a business in by... With respect to air ) voltage c ) Secondary emission d ) CRT, 48 Accuracy b ) transducer... Is applied across them produce an electrical output signal, which develop their output the form of energy used! Because they self-develop their electrical output signal, which is a discrete function of is... Voltage or current without any external source of power for their operation include: thermocouple therefore are.
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