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B.TECH 3rd sem Electronic Instrumentation paper 2016

UniversityVTU, Belgaum, Karnataka
CourseB.TECH
Semester3
SubjectElectronic Instrumentation
Year2016
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Heman Sharma
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Explain with examples:

i) Accuracy


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Explain with examples:

ii) Precision

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Explain with examples:

iii) Resolution

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A component manufacturer constructs certain resistances to be anywhere between 1.14  and 1.26 K and classifies them to be 1.2  resistors. What tolerance should be stated? If the resistance values are specified at 25°C and resistor have a temperature coefficient of +500 ppm/ºc. Calculate the maximum resistance that one of these components might have a at 75°C. 

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Determine the reading obtained with a de voltmeter in the circuit Fig.Q1(c). When the switch is set to position 'A', then set the switch to position 'B' and determine the reading obtained with a HWR and FWR ac voltmeter.

 

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With a neat block diagram, explain the principle and working of successive approximation DVM. 

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Explain with the help of block diagram the operation of a DFM.

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With a block schematic, explain the principle and working of dual slope integrating type DVM. 

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Explain C.R.T. features briefly.

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List the advantages of using negative supply in C.R.O.

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Describe with a diagram and waveform the operation of a dual trace CRO in ALTERNATE and CHOP Mode. 

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With a block diagram, explain construction and working of digital storage oscilloscope.

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Draw basic block diagram of a delayed-time-base (DTB) system. Sketch waveform and explain the operation. 

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With a block diagram, explain modern laboratory signal generator.

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Draw the block diagram of a frequency synthesizer using PLL. Explain its operation. 

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An unbalanced Wheatstone bridge given in Fig.Q6(a). Calculate the current through Galvanometer. 

                                           

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State and derive the two balance conditions for a Wein bridge.

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The arms of an ac Maxwell's bridge are arranged as follows:

AB and BC are non-reactive resistors of 100 each, DA a standard variable reactor L1 of resistance 32.7  and CD consists of a standard variable resistor R in series with a coil of unknown impedance Z, balance was found with L1 = 50 mH and Z1 = 1.36 R. Find R and L of coil. 

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With a neat diagram, explain differential output transducer. 

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State the advantages and limitations of thermistor.

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A displacement transducer with a shaft stroke of 3.0 in. is applied to circuit of Fig.Q7(c).The total resistance of potentiometer is 5 . The applied voltage Vt is 5V when the wiper is 0.9 in. from B, what is the value of output voltage?

                                              

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With a diagram, explain self balancing bolometer bridge.

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Explain piezo electrical transducer with a circuit diagram.

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State important features of LCD displays.

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Write short notes on LabVIEW.

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