Download Visvesvaraya Technological University (VTU) BE ( Bachelor of Engineering) ECE (Electronic engineering) 2017 Scheme 2020 January Previous Question Paper 3rd Sem 17EC32 Electronic Instrumentation
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s' mester B.E. Degree Examination, Dec.2019/Jan.2020
Electronic Instrumentation
Time: 3 hrs. Max. Marks: 100
Note: Answer any FIVE full questions, choosing ONE full question from each module.
Module-1
1 a. Explain the following terms brief] :
i) Accuracy
ii) Precision
iii) Resolution and significant errors. (07 Marks)
b. Explain the operation of the multirange ammeter with suitable circuit. (05 Marks)
c. Explain the operation of the RF Ammeter (Thermocouple) considering the different types
with suitable diagrams. (08 Marks)
OR
2 a. With suitable diagrams, explain briefly the operation of the multirange voltmeter. (07 Marks)
b. Calculate the value of the multiplier resistance on the 50V range of a dc voltmeter, that uses
a 20011A meter measurement with an internal resistance of 1000. (05 Marks)
c. With block diagram approach, explain the operation of the true RMS voltmeter. (08 Marks)
Module-2
3 a. Explain the operation of the ramp type digital voltmeter with voltage to time conversion
waveform and block diagram. (08 Marks)
b. Explain the operation of the 31/2 digit display with suitable diagram. (05 Marks)
c. With block diagram approach explain the operation of the digital phase meter. (07 Marks)
4 a.
b.
c.
OR
With block diagram, approach explain the operation of the digital PH meter. (06 Marks)
Explain the operation of the digital frequency meter with suitable block diagram. (07 Marks)
With block diagram approach, explain the operation of the successive approximation digital
voltmeter. (07 Marks)
Module-3
5 a. With block diagram of oscilloscope, explain the operation of CRO. And also mention the
functions of each block. (07 Marks)
b. Explain the operation of the sweep or time base generator with suitable circuit and relevant
Sawtooth output waveform. (07 Marks)
c. Explain the operation of the conventional standard signal generator with relevant block
diagram. (06 Marks)
OR
6 a. With block diagram approach, explain the operation of the AF sine and square wave
generator. (06 Marks)
b. Explain the operation of the function generator with relevant block diagram. (06 Marks)
c. Briefly explain the operation of digital storage oscilloscope with relevant block diagram.
(08 Marks)
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` 1111:4
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s' mester B.E. Degree Examination, Dec.2019/Jan.2020
Electronic Instrumentation
Time: 3 hrs. Max. Marks: 100
Note: Answer any FIVE full questions, choosing ONE full question from each module.
Module-1
1 a. Explain the following terms brief] :
i) Accuracy
ii) Precision
iii) Resolution and significant errors. (07 Marks)
b. Explain the operation of the multirange ammeter with suitable circuit. (05 Marks)
c. Explain the operation of the RF Ammeter (Thermocouple) considering the different types
with suitable diagrams. (08 Marks)
OR
2 a. With suitable diagrams, explain briefly the operation of the multirange voltmeter. (07 Marks)
b. Calculate the value of the multiplier resistance on the 50V range of a dc voltmeter, that uses
a 20011A meter measurement with an internal resistance of 1000. (05 Marks)
c. With block diagram approach, explain the operation of the true RMS voltmeter. (08 Marks)
Module-2
3 a. Explain the operation of the ramp type digital voltmeter with voltage to time conversion
waveform and block diagram. (08 Marks)
b. Explain the operation of the 31/2 digit display with suitable diagram. (05 Marks)
c. With block diagram approach explain the operation of the digital phase meter. (07 Marks)
4 a.
b.
c.
OR
With block diagram, approach explain the operation of the digital PH meter. (06 Marks)
Explain the operation of the digital frequency meter with suitable block diagram. (07 Marks)
With block diagram approach, explain the operation of the successive approximation digital
voltmeter. (07 Marks)
Module-3
5 a. With block diagram of oscilloscope, explain the operation of CRO. And also mention the
functions of each block. (07 Marks)
b. Explain the operation of the sweep or time base generator with suitable circuit and relevant
Sawtooth output waveform. (07 Marks)
c. Explain the operation of the conventional standard signal generator with relevant block
diagram. (06 Marks)
OR
6 a. With block diagram approach, explain the operation of the AF sine and square wave
generator. (06 Marks)
b. Explain the operation of the function generator with relevant block diagram. (06 Marks)
c. Briefly explain the operation of digital storage oscilloscope with relevant block diagram.
(08 Marks)
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b.
Module-4
Explain the operation of the phase meter which detects the phase for the positive half and
negative half using different circuits. (07 Marks)
Explain the operation of the field strength meter using diode circuit. (06 Marks)
A capacitance comparison bridge is used to measure a capacity impedance at a frequency of
2kHz. The bridge constants at balance are C3 = 100g, R1 = 101M, R2 = 50K.Q,
R3 = 100Ka Find the equivalent series circuit of the unknown impedance. (07 Marks)
OR
With Maxwell's bridge circuit, explain the balance condition. And derive an expression for
the R
x
and L. (07 Marks)
Find the equivalent parallel resistance and capacitance that causes a Wein bridge with the
following component values RI = 3.11(S2, C1 = 5.211F, R2 = 25K(2, f = 2.51M, R4 = 1001(a
(07 Marks)
c. Explain the operation of the basic Megger circuit with neat diagram. (06 NIarks)
Module-5
9 a. Explain the different types of resistive transducers with figure. Mention the advantages and
disadvantages. (07 Marks)
b. Explain the operation of the Industrial platinum resistance thermometer with bridge circuit.
(07 Marks)
c. Explain the operation of the photo transistor with construction, symbol, output
characteristics and photo transistor with relay circuit. (06 Marks)
OR
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10 a. Explain the Thermistor with resistance Vss temperature graph, and various configurations or
thermistor. And also mention the advantages and limitations. (07 Marks)
b. Explain the operation of the linear variable differential transducer with construction, various
core position of LVDT and variation of output voltage with displacement. (07 Marks)
c. Explain the operation of the piezoelectrical transducer with construction and equivalent
circuit. (06 Marks)
2 of 2
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This post was last modified on 02 March 2020