Stethoscope D. instrument used to hear pulse/heart beat b) Presence of external and internal capacitance 2. a) Reflection c) Ferrite a) Primary emission EEG A. c) Both S1 & S2 are true d) Inverting mode, 26. Active and Passive Transducers: Transducers, on the basis of methods of energy conversion used, may be classified into active and passive transducers. 924. d) Grid current, 23. Venturi is associated with a) Active transducers c) Refraction Resolution of a transducer depends on c) Passive transducer d) Iso-amps, 12. The outstanding characteristics of a D.C. amplifier is its b) Matching the impedance a) Common mode 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. 2. Ans : (c), 9. a) Self inductance 923 B. b) Length of wire d) Reduces the input impedances, 28. These transducers are classified into two types namely active transducers and passive transducers. 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. Out of 240 candies, 30% of the candies were given to Rahul and the remaining to Ashok. The resistance of LDR ________________ when exposed to radiant energy. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. d) Both S1 & S2 are false c) Diameter of wire d) Photo multiplier The slewing speed of X-Y recorder is Feedback in an amplifier always helps in d) Inverting mode, 27. Such materials are called d) 1.2 A.V, 47. a) Smaller d) Input isolation, 19. Raising input impedance of pre amplifier reduces c) Digital transducer The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ___________ transducer. A ball of mass 1 kg is attached to the end of a string having length 1 m, the other end of the string id fixed. d) 2.5 micron to 5 micron Photovoltaic cell . 41000 after another 3 months. Ans : (b), 22. In PMMC writing system, the magnitude of pen deflection is proportional to c) Photo transistor An electrometer amplifier has high input impedance of c) Time b) Reference electrode d) Selenium Active Transducer. a) When external mechanical force is applied to i c) Silver – Silver chloride electrode a) Heart rate d) 7.45 Ans : (d), 42. d) Pulse transducers c) Elliptical path c) Both S1 & S2 are true c) 1.5 A.V for 8 hours. a)Active b)Passive c)Secondary d) c) Vary equally depending on the core position Photo conductive cell consists of a thin film of I. b) 2 Photo emissive cathodes & 2 dynodes Self-generating type transducers i.e. a) S1 is true & S2 is false At the output of active transducers, we get equivalent electrical output signal e.g. 24. The active transducer are self generating devices which operate under the energy conversion principle. When a number of components are fabricated on same IC chip it is necessary to provide isolation between two different components for input interconnection is called __________ d) Diffusion, 49. Select one: True. b) Stable half cell potential d) Oscilloscope, 32. b) Attenuation The energy requires for generating the output signals are obtained from the physical quantity which is to be measured. The principle of operation of variable resistance transducer is c) Digital transducers b) Larger b) X-Y recording d) Electrical energy into light energy a) Displacement b) Current density at the electrodes Ans : (c), 31. b) Inductive c) S1 and S3 In foil strain gauge the thickness of foil varies from d) Input impedance is zero, 3. 1. Ans : (c), 11. Capacitive transducers are normally employed for___________ measurements Active Transducers These transducers do not need any external source of power for their operation. c) Galvanometric d) PMMC writing systems. The circuit o/p can be directly adjusted against the input value. Ans (b), 27. • 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. Ans : (a), 43. pH value of venous blood is a) S1 is true & S2 is false Magnetic recorder – (D) Drive motor Out of 240 candies, 30% of the candies were given to Rahul and the remaining to Ashok. d) Polarization, 41. b) Converts DC signal from low frequency to high frequency S2: Offset control c) Sensitivity d) Glass electrode c) Stray current d) Pulse d) 1015? These transducers are self-generating type transducers that operates based on the energy conversion principle. d) Permanence Fidelity represents 9. d) Constant, 34. Sphygmo-manometer C. Instrument used for measuring blood pressure 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. b) Silver electrode _____________ is the example of photo emissive cell b) Passive b) Differential amplifier c) 1,2and 3 Sub sequentially, some device is active or self-generating type transducers. In the following questions, some numbers are given at the left side and some are at the right side too. Ans : (b), 10. S1: Sense the magnitude, change in & / or frequency of same measurand Which of the following recorder gives slow response a) 2000 cm/?s b) S2 is true & S1 is false b) 25 micron (or) less a) Another emf LVDT windings are wound on 10. a) Static c) Both S1 & S2 are true d) Inverse d) 75 dB, 31. 41000 after another 3 months. An active transducer is a self-generating type transducer that has the ability to generate electrical voltage or current as its output without using any external source of power. Which of the following is a digital transducer? Pressure transducer for measuring blood pressure is Test electrode is also known as d) Excitation voltage b) When radiant energy stimulates the crystal S1: Cross over distortion compensation temperature or strain to electric potential, without any external source of energy being used. If digit “9” exists in any number (option) then your answer is that option. Active and Passive Transducer . 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 . 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