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. 6. Questions Sample Papers Notes ... done Units and Measurements Conceptual Problems Total Question - 50 question_answer1) What is the necessity of selecting some units as fundamental units? A screw gauge has 50 divisions on its circular scale. Name the errors caused in current transformer?. What are the various types of signal generators? 14. UNIT-V ACQUISITION SYSTEMS AND FIBER OPTIC MEASUREMENTS. CBSE XI Science Physics Units and Measurement The sun's angular diameter is measured to be 1920'' ( 1920 seconds) . Choose your answers to the questions and click 'Next' to see the next set of questions. This is done by power (rms)averaging, voltage averaging, or log-power averaging. For example, the distance between two cities on earth is measured in kilometres but the distance between stars or inter —galactic distances are measured in parsec. 4. 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. 12. Deflecting torque Controlling torque Damping torque. Which one of the following represents the correct dimensions of the coefficient of viscosity? 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) . State the applications of potentiometer. The balance equation is independent of frequency and therefore more accurate. Measurement. Along with the textbook question, this solution has exemplary problems, worksheets, questions from previous question papers, numerical problems, MCQs, short answer questions, tips and tricks. Dynamic characteristics are the set of rules or criteria that is defined for those instruments that varies very rapidly with time. The period of oscillation of a simple pendulum is $$T = 2\pi \sqrt {{L \over g}} $$. Can be used for both dc and ac m/s. 3. 5. State the advantages of ac potentiometers?. Name the types of instruments used for making voltmeter and ammeter. mm. To ensure that a digital voltmeter's reading is within the manufacturer's specified tolerances, they should be periodically calibrated against a voltage standard such as the Weston cell. LabVIEW offers powerful features that make is easy to connect to a wide variety of hardware and other software. 2. 6. Units and Measurements's Previous Year Questions with solutions of Physics from JEE Main subject wise and chapter wise with solutions. scale records the foll... JEE Main 2020 (Online) 6th September Evening Slot. dimensions. In the following ‘I’ refers to current and other symbols have their usual meaning. Many inputs are multiplexed and the result is produced based on the select signal. It is the ratio between power stored in the coil to the power dissipated in the coil. (i)Used for m/s of unknown emf (ii) Used for ammeter calibration (iii)Used for Voltmeter calibration(iv)Used for wattmeter calibration. 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. State the applications of PMMC instruments. 4. These Unit and Measurement Quiz Questions with Answers are useful for competitive exams like IIT, JEE, NEET, AIIMS, JIPMER etc. 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 . (ii) Which of the following is the unit used to measure time? 19. JEE Mains Units, Dimensions, Measurement Questions - In C.G.S. Units & Measurements MCQ Test - Set 03 GK Units Edit G.K. 1. 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. Physics is a quantitative science, based on measurement of physical quantities.Certain physical quantities have been chosen as fundamental or base quantities. Name any one Bridge that is used to measure the frequency? In a system of units in which unit of length is 10cm and unit of mass is 100g, yhen the value of density … DSO is known as digital storage oscilloscope, it is used for storing the waveform in a digital form. IEEE 488 bus is formerly known as Hewlett Packard interface Bus. What is meant by special Oscilloscope? The primary use is to measure the power of the spectrum of known and unknown signals. 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. Name the sources of errors in ac bridge m/s. What is the unit for measuring the amplitude of a sound? What is Automation in digital instruments? 19. 9. This insures that the maximumsinusoid is measured within the interval; however, smaller sinusoids withinthe interval may not be measured. (i)Bolometer power meter. 8. The std variable mutual inductance meter is called as inductometer. 4. Detectors are used in an attempt to adequately map the correct signal power, to the appropriate frequency point on the display. State the disadvantage of instrument transformers? 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. 14. 18. 7. Carpentry: Units of Measure – Study Guide 3(A&B) FB/2015 Page 1 Units of Measurement: A. (ii)0 to 5 milli ohms (iii)0 to 50 milli ohms (iv) 0 to 500 milli ohms (v)0 to 5 ohms. What is meant by Virtual instrumentation? 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. Which type of detector is used in ac bridges? When. (i)Errors due to stray magnetic fields. 18. Chooses appropriate units of measurement for area and volume and converts from one unit to another. Answer: Physical quantities are called large or small depending on the unit (standard) of measurement. Solved examples with detailed answer description, explanation are given and … Virtual instrumentation is a method of creating a Real time Environment in a virtual platform by Using software. The (i)AC supply with step-down transformer. The Imperial System Canada uses the metric system – most of the time! A, B, C and D are four different physical quantities having different (i)0 to 500 micro ohms. Each conversion will give them a letter to put in the sentence at the top of the sheet. (i)Eddy current loss. In what unit is the area measured? [2006 OL] Find the area of the rectangle drawn on the right using the measurements given. 10. We would also learn about commonly used tools for measurement of the physical quantities like length, mass, time, area and volume. 3. However, there are still places and occasions where the imperial system of measurement is used. Name the errors caused during measurement Error due to pressure coil inductance Error due to pressure coil capacitance Error due to methods of connection Error due to stray magnetic fields. (iii) Residual errors (iv)Eddy current errors (v) Frequency and waveform errors. (i)Insulation resistance of cables (ii) High resistance circuit elements (iii)Volume resistivity of a material (iv)Surface resistivity. 15. Fixed coil Moving Coil Current limiting resister Helical spring Spindle attached with pointer, 2. 2. State the advantages of Dynamometer type instruments. What are the various Static characteristics? Multimeters may use analog or digital circuits. Dimensions of $${1 \over {{\mu _0}{\varepsilon _0}}}$$, where symbols have their usual meaning, are, The physical quantities not having same dimensions are, Identify the pair whose dimensions are equal. The various types of storage oscilloscopes are Analog storage oscilloscope ♉ Mesh storage oscilloscope ♉ Bistable phosphor storage oscilloscope Digital storage oscilloscope. 7. (ii) Leakage errors. What are the constructional parts of current transformer? Average detection – average detection uses all of the data points within theinterval to consider the display point value. Spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument. For JEE Main other Engineering Entrance Exam Preparation, JEE Main Physics Units, Dimensions and Errors Previous Year Questions with Solutions is given below. The SI unit of gravitational potential is. 16. Name the ac sources used in ac bridges. Question 1 Convert the following measurements into m. a. 2x 1000. x 100. This is the General Knowledge Questions & Answers section on & Units, Devices, Dimensions and Measurements& with explanation for various interview, competitive examination and entrance test. Write down the deflecting torque equation in dynamometer. (iii)Autoranging power meter. 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. ... You can learn to convert km units into cm by using the SI base unit for measuring length which is the meter. This is the frequency that is in the middle of the display’s frequency axis. Adjusting the bandwidth of this filter allows for the discrimination of signals with closely spaced frequency components, while also changing the measured noise floor. DAQ is known as Data Acquisition system, it is meant for collecting the data, organizing the data, processing the data and storing the results. Measured value of L is 20.0 cm kno... A student measured the length of a rod and wrote it as 3.50 cm. What is meant by Resolution Bandwidth? 13. Various devices in IEEE 488 Bus are (i)Talkers. (A) Decibel (B) Coulomb (C) Hum (D) Cycles. State the applications of ac potentiometers. Also, peak detection does not give a good representation of random noise. 56100 mm c. 3.7 km A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Various methods of fiber optic power measurement are. Monitoring of processes and operations. Of the following quantities, which one has dimensions different from the remaining three (1) Energy per unit volume (2) Force per unit area (3) Product of voltage and charge per unit volume A student measures the time period of 100 oscillations of a simple pendulum four times. 13. The various methods used in RF power measurements are Calorimeter power meter Power measurement at high frequencies by Bolometer power meter, UNIT –III SIGNAL GENERATORS AND ANALYZERS. Units are the fundamental quantities of physics; Various units of measurements are Fundamental Units e.g. m/s of dc voltage and current used in dc galvanometer. Students should practice the multiple choice questions to gain more marks in NEET exams. Answer. Frequency is defined as the number of events of a particular sort occurring in a set period of time. Multiplexing is the the process of combining several input signals. (ii)Listeners and (iii) Controllers. 15. Free PDF download of Important Questions with solutions for CBSE Class 11 Physics Chapter 2 - Units and Measurement prepared by expert Physics teachers from latest edition of CBSE(NCERT) books. Name the faults that occur in cables. (i)Break down of cable insulation. What are the technical specifications of computer controlled test systems? The unit of current is (A) Ohm (B) Watt (C) Ampere (D) None of the above ... Estimating and Costing Objective Questions and Answers - Set 01. . It is used in m/s of errors in CTS. 17. 23. What are the various Dynamic characteristics? 20. Drysdale Tinsley potentiometer Gall Tinsley potentiometer. State the disadvantage of Maxwell-wein bridge. 13. The input signal a spectrum analyzer measures is electrical, however, spectral compositions of other signals, such as acoustic pressure waves and optical light waves, can be considered through the use of an appropriate transducer. Download latest questions with answers for Physics Units and Measurements in pdf free or read online in online reader free. km2. 2. 20. 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. The true RMS meter is used to determine the rrot mean square value of the current and voltage. 5. CRO is used in Medical field Waveform analysis Study of time period and amplitude of the waveform Military applications. Nav. using superheterodyne techniques and then analyzed using fast fourier transformation (FFT) techniques. The density of material in CGS system of units is 4 g / c m 3. A multimeter or a multitester, also known as a VOM (Volt-Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit. Practice Test: Question Set - 01. Current coil with series magnet Voltage coil with shunt magnet All disc Braking magnet Registering mechanism. Cannot be used for ac m/s Some errors are caused by temperature variations. What are the various units of measurements? In which cases audio frequency oscillators are used as ac source. You need to know the basics of cm and km. Various Static characteristics are Accuracy, Precision, Error, Threshold, Bias, Linearity, Stability, Reproducibility Hysterisis, Range, Dead Space, Sensitivity. 14. And later it was given IEEE standard and was known as IEEE 488 bus. Various types of special oscilloscopes are DSO Delayed time base oscilloscope Dual trace oscilloscope Dual Beam oscilloscope Sampling oscilloscope. Name the loop test methods used in location of fault in fiber. This method needs a std variable capacitor. These two parameters allow for adjustment of the display within the frequency range of the instrument to enhance visibility of the spectrum measured. 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