State the advantages of Hot wire type instruments, Can be used for both dc and ac Unaffected by stray magnetic fields Readings are independent of frequency and waveform. Name the bridge circuits used for the m/s of mutual inductance. Units, Dimensions and Errors MCQ with detailed explanation for interview, entrance and competitive exams. Fixed coil Moving Coil Current limiting resister Helical spring Spindle attached with pointer, 2. State the disadvantage of instrument transformers? UNIT-V ACQUISITION SYSTEMS AND FIBER OPTIC MEASUREMENTS. A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Various devices in IEEE 488 Bus are (i)Talkers. Great for practising converting between metric units. And later it was given IEEE standard and was known as IEEE 488 bus. J-kg 2. A typical multimeter may include features such as the ability to measure voltage, current and resistance. Free PDF download of NCERT Solutions for Class 11 Physics Chapter 2 - Units and Measurement solved by Expert Teachers as per NCERT (CBSE) textbook guidelines. State the applications of ac potentiometers. 14. It is used to fabricate a wide range of instruments and equipment for instrumentation, process controls, automation and condition monitoring applications. a measurement, so that it is understood by everyone in the same sense? 11. Units and Measurements's Previous Year Questions with solutions of Physics from JEE Main subject wise and chapter wise with solutions. 16. (i)M/s of self inductance. Choose your answers to the questions and click 'Next' to see the next set of questions. (i)Primary winding,(ii)Secondary winding (iii)Magnetic core. On this code-breaker worksheet, students need to convert the metric measurements into the units shown. The resolution bandwidth filter or RBW filter is the bandpass filter in the IF path. It is used in m/s of errors in CTS. (iii) Residual errors (iv)Eddy current errors (v) Frequency and waveform errors. Series ohm meter method Shunt ohm meter method. 4. The destructive method phosphor burning is avoided by coating the fluorescent screen with a layer of Willemite, which is the composition of zinc and Mno, The ability of the material to emit energy is known as fluorescence. State the disadvantages of PMMC instruments. Static characteristics are the set of rules or criteria that is defined for those instruments that varies very slowly with time or remains a constant. ฀. 11. In another system where the fundamental scale records the foll... JEE Main 2020 (Online) 6th September Evening Slot. The magnitude of its momentum is recor... Out of the following pair, which one does NOT have identical dimensions is. The oscilloscope which is not only meant for viewing the waveform , but also used to perform some special functions such as storage of information, retrival of waveform, stability etc.. (i)Used for m/s of unknown emf (ii) Used for ammeter calibration (iii)Used for Voltmeter calibration(iv)Used for wattmeter calibration. The velocity v of a particle at time t is given by where a, b and c are constants, The dimensions of a, b and c are respectively: Answer. (i)Insulation resistance of cables (ii) High resistance circuit elements (iii)Volume resistivity of a material (iv)Surface resistivity. Some spectrum analyzers, such as real-time spectrum analyzers, use a hybrid technique where the incoming signal is first down-converted to a lower frequency. What is the purpose of braking mechanism.? The megger is an instrument used for the measurement of high resistance and insulation resistance. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. 8. [2006 OL] Find the area of the rectangle drawn on the right using the measurements given. Technical Specifications ฀, Intelligent Torque Loadcell capacities: 0.3N.m, 1.5N.m, 3N.m, 6N.m, 10N.m (2.7lbf.in, 13lbf.in, 26lbf.in, 52lbf.in, 90lbf.in) ฀, Maximum sample height of 448mm (17.6") * ฀, Capacity of upper mounting table from 10 to 78mm (0.39 - 3.07") ฀, Capacity of lower mounting table from 10 to 190mm (0.39 - 7.5") ฀, Speed range of 0.1 - 20 revs/min (clockwise and counter-clockwise) ฀. In ammeter by connecting a shunt resister In voltmeter by connecting a series resister. The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 $$ \times $$ 10–3 are, The dimension of magnetic field in M, L, T and C (coulomb) is given as. What are the types of Spectrum Analyzer? How resistance is measured in direct deflection method. 3. The distance D of sun from the earth is 1.496 × 10^11m . Various Dynamic characteristics are i)Fidelity, (ii)Speed of Response,(iii)Time Delay,(iv)Lag,(v)Dynamic error. What is Automation in digital instruments? In what unit is the area measured? 19. Why Is LabVIEW Ideal for Creating Virtual Instruments? DSO is known as digital storage oscilloscope, it is used for storing the waveform in a digital form. Answer: Physical quantities are called large or small depending on the unit (standard) of measurement. 13. Span specifies the range between the start and stop frequencies. ... CBSE Class 11 - Physics - Units and Measurements - MCQs Multiple Choice Questions . What are the types of frequency synthesizer? State the advantages of Dynamometer type instruments. What ranges of resistance can be measured by using doctor ohmmeter. What are the various devices in IEEE 488 Bus? (ii) Leakage errors. How the range of instrument can be extended in PMMC instruments. Let [$${\varepsilon _0}$$] denote the dimensional formula of the permittivity of vacuum. Virtual instrumentation is a method of creating a Real time Environment in a virtual platform by Using software. State the disadvantages of Hay’s bridge.? 9. also used to perform some special functions such as storage of information, retrival of waveform, stability etc.. 18. View Solution play_arrow; question_answer2) Chooses appropriate units of measurement for area and volume and converts from one unit to another. The primary use is to measure the power of the spectrum of known and unknown signals. Name the loop test methods used in location of fault in fiber. [2010 OL] (i) Which of the following is the unit used to measure mass? km2. This is the frequency that is in the middle of the display’s frequency axis. There are swept-tuned and FFT based spectrum analyzers: ฀, A swept-tuned spectrum analyzer uses a superheterodyne receiver to downconvert a portion of the input signal spectrum (using a voltage-controlled oscillator and a mixer) to the center frequency of a band-pass filter. Dynamic characteristics are the set of rules or criteria that is defined for those instruments that varies very rapidly with time. Spectrum analyzer types are dictated by the methods used to obtain the spectrum of a signal. Can be used for m/s of both magnitude and phase angle Can be used for m/s of inductance of the coil. Various types of special oscilloscopes are ฀ DSO ฀ Delayed time base oscilloscope ฀ Dual trace oscilloscope ฀ Dual Beam oscilloscope ฀ Sampling oscilloscope. Multiple Choice Questions. Name the errors caused in current transformer?. LabVIEW offers powerful features that make is easy to connect to a wide variety of hardware and other software. The fundamental quantities that are chosen are Length, Mass, Time, electric current, thermodynamic temperature, amount of substance, and luminous intensity. Average detection – average detection uses all of the data points within theinterval to consider the display point value. (ii)0 to 5 milli ohms (iii)0 to 50 milli ohms (iv) 0 to 500 milli ohms (v)0 to 5 ohms. 17. An answer sheet can also be found below. Voltmeter accuracy is affected by many factors, including temperature and supply voltage variations. 2x 1000. x 100. 6. Peak detection – peak detection uses the maximum measured point within agiven interval as the display point value. : Length (m), Mass (kg), and time (S) Supplementary & Derived Units. 7. Free from hysterisis and eddy current errors. J-kg. Less expensive Can be used for both dc and ac Reasonably accurate. It is used to measure the quality factor of the coils such as inductors, Capacitors etc.. Q-meter is generally used to measure the Q-factor of the coil. The solved question papers from chapter 2 Units and Measurements have all type of questions may be asked in annual exams such as VSA very short answer type questions, SA short answer type questions, LA long answer type questions, VBA value based questions and HOTS higher order thinking skill based questions. (i)Eddy current loss. Cannot be used for ac m/s Some errors are caused by temperature variations. LabVIEW is an integral part of virtual instrumentation because it provides an easy-to-use application development environment designed specifically with the needs of engineers and scientists in mind. The SI unit of gravitational potential is. 13. For high frequency ac requirement audio frequency oscillators are used. The common system of units which is used in mechanics are given below: 1. [2007 OL] In a system of units in which unit of length is 10cm and unit of mass is 100g, yhen the value of density … Name the sources of errors in ac bridge m/s. Solved examples with detailed answer description, explanation are given and … Recognises that the conversion factors for area of units are the squares of those for the corresponding linear units and for volume, units are the cubes of those for the corresponding linear units . MCQ quiz on Units and Dimensions multiple choice questions and answers on Units and Dimensions MCQ questions quiz on Units and Dimensions objectives questions with answer test pdf for interview preparations, freshers jobs and competitive exams. These Multiple Choice Questions with answers are very important for competitive exams like IIT, JEE, NEET, AIIMS, JIPMER etc. 19. 20. The process in which the trace of the waveform is obtained on the phosphor screen, and when the trace is present for long time, the heat generated is capable of destroying the phosphor screen, which is known as phosphor burning. 6. Variable Capacitor is costliest. In which cases audio frequency oscillators are used as ac source. 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