Important RGPV Question
EX- 604 (A) Electronic Instrumentation
VI Sem, EX
UNIT 1- Introduction To CRO
Q.1) Draw a block diagram of general purpose CRO and explain the function of each block. Write at least four applications of CRO.
(RGPV May 2024)
Q.2) Elaborate the principle and working of dual beam and dual trace oscilloscope with neat sketch.
(RGPV May 2024)
Q.3) Describe the different types of graticules used in CRO.
(RGPV May 2024)
Q.4) Lissajous pattern on an oscilloscope is stationary and has 5 horizontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 1000 Hz. Find the frequency of vertical input.
(RGPV May 2024)
Q.5) List the applications of sampling oscilloscope and what precautions must be taken when using a sampling oscilloscopе?
(RGPV May 2024)
Q.6) Explain dual beam and sampling CRO with necessary sketches and diagrams.
(RGPV May 2023)
Q.7) An electrically deflected CRT has a final anode voltage of 2000 v and parallel deflecting plates 1.5 cm along and 5 mm apart. If the screen is 50 cm from the center of deflecting plates. Find:
i) beam speed
ii) the deflection sensitivity of the tube
iii) deflection factor of the tube
(RGPV May 2023)
Q.8) List the various parts of CRO. Draw its block diagram and explain the working of all parts of CRO.
(RGPV May 2022)
Q.9) How does the digital oscilloscope differ from the conventional storage oscilloscope using a storage cathode tube?
(RGPV May 2022)
Q.10) Explain the working of dual beam oscilloscope with diagram.
(RGPV May 2022)
UNIT 2- A.C. Bridge Measurement
Q.1) Draw a circuit diagram for Maxwell’s inductance capacitance bridge. Drive the expression for measurement of unknown parameters. Also discuss its merits and demerits.
(RGPV May 2024)
Q.2) A capacitor is tested by a Schering Bridge which forms one arm AB oft he bridge. The other arms are AD – a non- inductive resistance of 1002, DC a non-reactive resistance of 3002 in parallel with a capacitor of 0.5µF, BC- a standard loss free capacitor of 100pF, the supply frequency is 50Hz. The bridge is balanced. Calculate the capacitor value and power factor of the capacitor under test.
(RGPV May 2024)
Q.3) Explain the working of Schering Bridge with neat sketches. What are the special features of high voltage Schering Bridge?
(RGPV May 2023)
Q.4) Explain why Maxwell inductance Capacitance Bridge is useful for measurement of inductance of coils having storage factor between 1 and 10.
(RGPV May 2023)
Q.5) What are the sources of errors in bridge circuits? How they can be minimized? Explain.
(RGPV May 2022)
Q.6) Draw the circuit diagram of Wien bridge. Explain the measurement of frequency with it.
(RGPV May 2022)
Q.7) Describe the circuit and working of a Q-meter. Explain its application.
(RGPV May 2022)
UNIT 3- Transducers
Q.1) Define strain gauge. Compare the gauge factor and temperature sensitivity of metal and semiconductor resistance strain gauge.
(RGPV May 2024)
Q.2) A resistance strain gauge with a gauge factor of 2 is cemented to a steel member, which is subjected to a strain of 1 x 10-6. If the original resistance value of the gauge is 1302. Calculate % change in resistance.
(RGPV May 2024)
Q.3) A piezo quartz crystal has the dimensions 2mm × 2mm x 1mm. Quartz has the following properties charge sensitivity=21 C/N, Young’s modulus = 86 x 101°N/m², Permittivity =40.6 x 10-12 F/m. Calculate the value of force, charge and voltage if the crystal is subjected to a strain of 10 x 10-6 m/m.
(RGPV May 2024)
Q.4) List the various types of temperature transducers and describe the applications based on measurement range.
(RGPV May 2024)
Q.5) Explain working principle of strain gauge also define the expression for gauge factor.
(RGPV May 2023)
Q.6) Describe the different modes of operation of piezo-electric transducers. Also explain the application of Piezo-electric transducers.
(RGPV May 2023)
Q.7) Describe the method for measurement of temperature with
the use of-
i) RTD
ii) Thermistors
(RGPV May 2023)
Q.8) What is Transducer? Explain primary and secondary transducer with the help of an example.
(RGPV May 2022)
Q.9) Explain the theory of strain gauge and derive an expression for gauge factor.
(RGPV May 2022)
Q.10) Explain the construction and working of LVDT.
(RGPV May 2022)
UNIT 4- Signal Generators & Wave Analyser
Q.1) What is signal generator? Draw the block diagram of a function generator and explain the method of producing sine wave.
(RGPV May 2024)
Q.2) What do you mean by spectrum analysis? Draw the block diagram of spectrum analyser.
(RGPV May 2024)
Q.3) Discuss in detail about the AF Sine and square wave generator.
(RGPV May 2023)
Q.4) Describe the circuits and working of wave analysers used for audio frequency and megahertz ranges.
(RGPV May 2023)
Q.5) Explain the following terms:
i) Total harmonic distortion
ii) Beat frequency oscillator
(RGPV May 2023)
Q.6) What do you understand by function generator? Explain it’s working principle.
(RGPV May 2023)
Q.7) For a transducer describe the followings:
i) primary and secondary Transducer
ii) input characteristics.
(RGPV May 2023)
Q.8) What is the importance of Spectrum analyzer? Explain it operation with diagram.
(RGPV May 2022)
Q.9) What is Function Generator? Explain its operation with diagram.
(RGPV May 2022)
Q.10) Describe with the help of diagram, the working of Beat frequency oscillator.
(RGPV May 2022)
UNIT 5- Digital Instruments
Q.1) State the advantages of a DVM. With the help of diagram explain the operating principle of ramp type DVM.
(RGPV May 2024)
Q.2) A 3½ digit voltmeter is used for voltage measurement.
i) Find its resolution
ii) How would 11.52V be displayed on the 10V range?
iii) How would 0.5234V be displayed on 1V and 10V ranges?
(RGPV May 2024)
Q.3) What do you understand by digital meter? Explain the working principle and operation of a digital frequency 0meter.
(RGPV May 2024)
Q.4) Explain the IEEE 488 instrumentation bus with the help of necessary schematic diagram.
(RGPV May 2023)
Q.5) Define these terms:
i) LED
ii) DVM
(RGPV May 2023)
Q.6) Briefly discuss the use of LED and LCD as display devices in instrumentation. Comment on their relative merits and demerits.
(RGPV May 2024)
Q.7) What is XY recorder? Explain with suitable circuit diagram, he working of an XY recorder and also write its applications.
(RGPV May 2023)
Q.8) Draw the block diagram of digital frequency meter and explain the functions of its each block.
(RGPV May 2022)
Q.9) Explain the theory and working of LCDs. Also explain the advantages of LCDs.
(RGPV May 2022)
Extra Questions-
Q.1) Define these terms:
i) Graticule and Lissajous patterm
ii) Q meter
(RGPV May 2023)
Q.2) Write a short note on any two of the following.
i) Wagener’s earthing device
ii) Application of CROS
iii) X-Y recorders
(RGPV May 2022)
— Best of Luck for Exam —
