Isolation amplifier actually operates on the principle of b) Velocity Following questions are completely based upon numbers. 30000 after another 2 months. A strain gauge is a passive transducer and is employed for converting d) Input impedance is zero, 3. To reduce common mode interference during recording of bio signals one can use__________ b) Frequency b) Dynamic Ans : (c), 34. d) Both static and dynamic b) Passive Ans : (c) 32. a) Unity 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”. c) Increase output impedance c) Change in both length and diameter Which of the following can be measured with the help of piezo electric crystal? Strain gauge, LVDT and thermocouple are examples of In X-Y recorders, the self balancing potentiometers plot emf as a function of b) S1 and S2 are false b) Inductive b) Mutual inductance d) Pressure, 45. d) Primary transducers At the output of active transducers, we get equivalent electrical output signal e.g. a) S1 is true & S2 is false The resolution limit of electron microscope is A car travels at a speed of 45 m/sec. c) Limb movement A transducer that converts measurand into the form of pulse is called Ans : (c), 12. a) Reduces voltage gain c) 1.5 A.V Capacitive transducers are normally employed for___________ measurements d) 2,3and 4 b) 1.3 m/s Ans : (d), 5. a) Active d) mVsin? b) Voltage a) Define active and passive transducers. d) Amplification Expert Answer . d) When the junction of two such crystals are heated b) Presence of external and internal capacitance 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. Active transducers are self-generating type, they don’t require external power to work while passive transducers require external power to work. Ans : (b), 29. Definition of Active Transducer. 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) Passive transducer d) Self generating transducer Ans : (c) 32. c) Thermo-electric The crystal has the property of producing the output voltage when the … d) LVDT c) 2 Photo emissive cathodes & 1 dynode b) Output amplifier b) Electrical quantity into mechanical quantity a) Are independent of the core position for 8 hours. a) S1 and S2 c) Controlling its output If Rahul gave 25% of his candies to Ashok, what percentage of the total candies remained with Rahul? a) Power amplifier a) 1-A, 2-B, 3-C, 4-D They do not require external power source to produce the output. Pressure transducer for measuring blood pressure is b) Electron microscope The decibel is a measure of d) Inverse Using mechanical chopper we cannot achieve high chopping rates due to their Thermocouple . a) Heart rate c) Time c) mVsin?-eB Ans : (d), 23. a) LDR c) Analog transducers b) 1,3and4 a) Strain gauge transducer only a) Calomel electrode b) Power 3. Match the following d) Both S1 & S2 are false, 39. d) Both S1 & S2 are false, 21. Moving coil generator Passive transducers require an external power, and the output is a measure of so Piezo-electric transducers are Ans : (c), 9. S1: To magnify object, under observation d) Fiber group Ans : (a), 18. Self generating type transducers are _ transducers. 20000 more, but withdrew Rs. d) Pressure A car travels at a speed of 45 m/sec. d) Direction, 40. c) Utmost economy a) Common mode gain to differential mode gain Ans : (c), 42. Which of the following are piezo electric substances? b) S2 and S3 c) Common mode gain at input to differential mode gain at input Silver chloride electrode is used as a reference electrode due to its The principle of operation of variable resistance transducer is b) 1000 cm/?s d) 1.2 A.V, 47. Piezo – electric transducers work when we apply _____________ to it. Thermistor3). Ans : (d), 35. Resistively generated inference arises through incorrect __________________ 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”. c) Inverting operational amplifier In this type of inductive transducer, a simple single coil is used as the transducer. c) Changes the shape of the waveform of the signal The amplifier which has no drift is called as S1: Change in dimension of wire expressed by factor (1-2µ) S2: Recording average values a) mVsin?+eB c) Reaches unity b) Encoder II. b) Analog transducer d) Avoidance of frequency sensitive components, 10. a) Ability to amplify Dc and low frequency signals The outstanding characteristics of a D.C. amplifier is its Ans (b), 27. a) S1 is true & S2 is false 1. 1300503. b) Reference electrode c) Illuminations a)Active b)Passive c)Secondary d) Diagnostic tool for brain alignment d) Chopper amplifier, 8. Active Transducers . c) Electrical energy into thermal energy c) Both S1 & S2 are true 25. b) 1 – B, 2 – A, 3 – D, 4 – C b) Inverse transducers A. d) Foot pressure Ans : (a), 2. a) Graphic pen recorder d) Inter stage transformer, 9. The CMRR of a typical IC OPAMP is S2: Transducer is also called as sensor. b) Change in length of the wire 1. Storage oscilloscope operates on the principle of I solely depend on you. a) Static c) Reaches maximum c) Birefringent Ø These transducers do not require any external source or power for their operation. c) Infinity 4. The active transducers are self-generating devices which operate under the energy conversion principle. S1: Reproduction of signal c) When external magnetic field is applied CMRR is more in_______________ 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. If Rahul gave 25% of his candies to Ashok, what percentage of the total candies remained with Rahul? It modifies the inductance of the circuitas well as the equivalent output. 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. Fidelity represents Which of the following recorder gives slow response c) 1.4 m/s Ans : (c), 15. a) 1 to 1.5 a) Primary emission 1. a) Miller effect b) 2 Photo emissive cathodes & 2 dynodes 20000 more, but withdrew Rs. Ans : (a), 44. Active Transducer: - ----- (1 Mark) • These transducers do not need any external source of power for their operation. It is noteworthy in case of active transducers that the output produced is very small thus further … c) Transient b) Length of wire This happens mainly due to 2. A. 40000 more after 3 months of starting, but withdrew Rs. ans (b), 40. a) Another emf Ans : (b), 37. a) Increasing its input impedance 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? After 2 months of starting, P invested Rs. The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in rad/s) is. d) Inverting mode, 27. d) Oscilloscope, 32. S3: Poor linearity c) 1,2and 3 Bonded wire strain gauges are b) 1.5 to 2.0 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 … b) Passive transducers d) Electrical energy into light energy Photo multiplier consists of If the standard deviation of a population is 2.9, what would be the population variance? The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ___________ transducer. a) Straight line path S2: Reproduction of phase relation b) Current density at the electrodes a) Buffer amplifier d) Pressure a) Steel sheets Ans : (a), 43. pH value of venous blood is a) Active transducer b) Primary sensor c) Passive transducer d) Self generating transducer. Piezo electric crystal can produce an emf ____________ fiber is used in interferometric instruments. d) Differential amplifier, 18. b) Differential amplifier The active transducer are self generating devices which operate under the energy conversion principle. c) 85 dB a) Active b) Passive c) Secondary d) Inverse Ans : (a) 2. Power amplifier is provided with c) Digital transducers b) Differential mode c) Thermistor Ans : (d), 42. Ans : (c), 3. The principle of operation of variable resistance transducer is b) Output impedance is zero thermocouple. What is the distance (in km) travelled by the car? What will happen to lens when they are immersed in liquid which has the same refrative index as the lens with respect to air? Ans : (a), 8. a) Phase angle S2: To provide electrical output that furnishes accurate, quantitative data about the measurand a) S1 is true & S2 is false 6. When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in a) Monomode A ————– is usually a display device used to produce a paper record of analog wave form. Magnetic recorder – (D) Drive motor • The active transducer are self-generating … c) S1 and S3 Lead Zirconate Ans : (d), 4. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. temperature to electric potential, without any external source of energy being used. Ans : (b), 16. Venturi is associated with The _________ of a recording system is the magnitude of input voltage required to produce a standard deflection in a recorded trace. a) Smaller • 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. 924. c) 1-B, 2-A, 3-D, 4-C d) Diffusion, 49. d) 1 Photo emissive cathode & 1 dynode In PMMC writing system, the magnitude of pen deflection is proportional to a) Natural group c) Never b) Oscillographic Active Transducer. a) 2 A.V ACTIVE AND PASSIVE TRANSDUCERS Active transducers : These transducers do not need any external source of power for their operation. Ans (a), 49. b) Exclusively used for stress analysis a) Input current d) Magnetic b) Delays the signals I. If numbers of both sides are same, then answer would be ‘Y’ (Yes) and if numbers are different the answer will be ‘N’ (No).A. Such materials are called Active transducers develop their own voltage or current. b) X-Y recording c) Non inverting mode While, Q invested Rs. Sphygmo-manometer C. Instrument used for measuring blood pressure a) Grounding 41000 after another 3 months. • 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. Therefore they are also called as self generating type transducers. a) Converts AC signal from low frequency to high frequency c) Refraction b) Temperature stability 2. c) S1 is false and S2 is true Ans : (a), 30. The second column gives for each of the listed transducer, the basic principle involves in causing change in R, L, C or in directly generated voltage or current. d) Selenium Cadmium and sulphate d) Inverting mode, 26. a) Active c) Inverting operational amplifier The principle of operation of LVDT is based on the variation of a) 7.30 S2: Voltage in the coil d) Eddy current In the following questions, some numbers are given at the left side and some are at the right side too. c) Time b) Increases the voltage gain Which of the following represent active transducer?1). d) Both S1 & S2 are false, 43. LVDT4). c) Increases the gain band width product Solution for Active transducers are self generating type transducers. Most commonly used indicator electrode is However they provide an electrical output when stimulated by some physical form of energy. If numbers of both sides are same, then answer would be ‘Y’ (Yes) and if numbers are different the answer will be ‘N’ (No).A. a) Active transducer b) Frequency b) S2 is true & S1 is false b) Vary unequally depending on the core position c) Both S1 & S2 are true d) Converts DC signal from low frequency to high frequency, 20. Ans : (b), 22. Active transducers are self generating type transducers. b) Differential amplifier a) Material of wire d) Photo-resistive b) Differential amplifier Ans : (a), 13. d) Decrease output impedance, 22. c) Magnitude d) 75 dB, 31. Function of microscope is Exam ples of these transducers include: . a) Limiting the bandwidth •The active transducer are self generating devices which operate under the energy conversion principle. Ans : (a), 14. b) Zero Raising input impedance of pre amplifier reduces Photovoltaic cell . c) Secondary d) Decreases 7. If more than one number (option) has digit 9, the answer will be E.A.3001053   B.7181392   C.222324   D.6703378, 5. a) DC amplifier c) Silver – Silver chloride electrode Sub sequentially, some device is active or self-generating type transducers. d) Pressure into displacement d) Unpredictable Thermocouple. d) Circular path d) Permanence d) Input impedance, 15. This website needs some kind support from All the visitors. S1: Sense the magnitude, change in & / or frequency of same measurand d) 1015? S1: Current flowing through the coil 4. Photo conductive cell consists of a thin film of temperature or strain to electric potential, without any external source of energy being used. d) Photo multiplier d) Common mode gain at output to differential mode gain at output. a) 1 Photo emissive cathode & 2 dynodes d) CRT, 48. b) 1-D, 2-C, 3-B, 4-A b) Frequency Ans : (c), 4. … 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. The shorter wave length of the electron permits the detailed examination of tiny objects due to reduction of ___________ effects False. Stress and strain curves are plotted using a) Active b) Analog c) Digital d) Pulse Ans : (c) 3. The concept of "Rule of Law" is a special feature of constitutional system of ________. c) 7.35 Out of 240 candies, 30% of the candies were given to Rahul and the remaining to Ashok. Isolation amplifiers are also called as II. d) Reaches infinity, 35. Power gain in decibels is equal to voltage gain in decibels only when Lead titanate S1: In multimode fiber optics, intensity modulating schemes can be employed. c) S1 false and S2 true generating type transducers. d) Both S1 and S2 are false a) 1,2 and 4 Ans : (a), 41. What is the distance (in km) travelled by the car? b) Decrease input impedance 923   B. Pre amplifier isolation in ECG circuit is to Ans : (c), 6. d) Input isolation, 19. 31. induction (B) will be a circle of radius (r) = a) Common mode A recorder is said to have good frequency response when the sensitivity of the system is _________ for all frequencies present in the signal. Question 1. Ans : (b), 19. d) 2.5 micron to 5 micron The improper response time of the amplifier in the biomedical recorders a) 70 dB S2: Offset control c) Force into a displacement d) 7.45 a) 1010? Stethoscope D. instrument used to hear pulse/heart beat d) X-Y, 6. Self generating type transducers are _____ transducers. ___________ amplifier is used to drive the recorder. c) Common mode rejection c) Stray current 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 slewing speed of X-Y recorder is LVDT is an/a ___________ transducer c) Operational amplifier b) Output current 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) Strain gauge b) Thermocouple c) Thermistor d) RTD The change in resistance of a metal wire owing to strain is due to c) Single ended amplifier b) Stable half cell potential a) Single ended mode a) Magnetic tape recording *eB, 37. b) Multimode c) Noise factor of unity They generate their voltage or current signal. Ans : (b), 45. Ans : (b), 28. 31. When the input of differential amplifier V1 = 0, then the differential amplifier is said to be operated in d) Are always in phase quadrature d) Chopper amplifier, 16. Inductance Transduction: • In inductive transduction, the measurand is converted into a … for 8 hours. As the output of active transducers we get an equivalent electrical output signal e.g. b) Strain gauge or capacitive transducer c) Passive transducer P and Q started a business in partnership by investing in the ratio 7 ∶ 8. a) Increases Ans : (b), 21. c) Inverting amplifier d) 1 – A, 2 – B, 3 – C, 4 – D The use of storage oscilloscope c) Diameter of wire b) S2 is true & S1 is false c) Current c) Resistive If the standard deviation of a population is 2.9, what would be the population variance? Self generating sensors quiz exam Sr. no. Active and Passive Transducers: Transducers, on the basis of methods of energy conversion used, may be classified into active and passive transducers. a) X-Y recorder Electron microscope – (A) Electron gun d) 1-C, 2-D, 3-A, 4-B, 38. c) Converts AC signal from low frequency to DC high frequency 3 Answers. The draw backs of strain gauges are The active transducer are self generating devices which operate under the energy conversion principle. d) Coated b) Analog c) Both S1 & S2 are true The concept of "Rule of Law" is a special feature of constitutional system of ________. S2: Change in resistance ?? In an amplifier, the coupling capacitors are employed for d) Pulse transducers a) Single ended amplifier a) Change in diameter of the wire Active transducers are those which do not require any power source for their operation. d) Grid current, 23. c) 1- C, 2 – A, 3 – B, 4 – D The active transducer is also known as the self-generating transducer because they self-develop their electrical output signal. 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. b) 105? c) Digital transducer EEG A. Following questions are completely based upon numbers. a) Input amplification a) Force Ans (a), 48. Barium titanate Ans : (b), 36. Which of the following is a digital transducer? 1). d) PMMC writing systems. a) S1 is true & S2 is false b) Photo diode d) 2500 cm/?s, 50. a) S1 is true & S2 is false c) Response time The maximum tension that the string can bear is 324 N. The maximum possible value of angular velocity of ball (in rad/s) is. b) Pre amplifier S2: Schemes using polarizing techniques need birefringent fiber. a) An electrical quantity into a non electrical quantity 24. Thermocouple Active transducers are self-generating type, they don’t require external power to work while passive transducers require external power to work. d) Pressure measurement c) Coupling of two coils changes with displacement Therefore they are also called as self generating type transducers. After 2 months of starting, P invested Rs. In a LVDT, the two secondary voltages a) Magneto-strict ion As the output of active transducers we get an equivalent electrical output signal e.g. This transducer is also named as -self-generating transducer.