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Electronic Measurement & Instrumentation : Question Paper Dec 2015 - Electronics and Comm. Engg. (Semester 4) | Gujarat Technological University (GTU)

## Electronic Measurement & Instrumentation - Dec 2015

### Electronics and Comm. Engg. (Semester 4)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
1(a) Explain the following terms
1. Sensitivity
2. Reproducibility
3. Drift
4. Precision
5. Linearity
7. Repeatability
(7 marks)
1(b) Explain Anderson bridge with vector diagram and also derives balance Equation.(7 marks) 2(a) Describe the working of a digital frequency meter with schematic block Diagram.(7 marks)

### Solved any one question from Q.2(b) & Q.2(c)

2(b) Draw the circuit of Kelvin's double bridge used for measurement of low resistance. Derive the condition for balance.(7 marks) 2(c) Explain salient features of Maxwell's Inductance capacitance bridge. Draw phasor diagram and derive balance equation.(7 marks)

### Solved any one question from Q.3 & Q.4

3(a) Explain True RMS Reading Voltmeter.(7 marks) 3(b) Draw the block diagram of an oscilloscope and explain briefly its major system.(7 marks) 4(a) Describe digital storage oscilloscope with schematic block diagram and state its Applications.(7 marks) 4(b) Explain Vector Impedance Meter.(7 marks)

### Solved any one question from Q.5 & Q.6

5(a) Explain harmonic distortion analyzer.(7 marks) 5(b) Describe the working of a frequency synthesizer with schematic block diagram.(7 marks) 6(a) Explain frequency selective wave analyzer with block diagram.(7 marks) 6(b) Describe the construction and working of L.V.D.T. with neat sketches. Draw its Output characteristics. State advantages and disadvantages of it.(7 marks)

### Solved any one question from Q.7 & Q.8

7(a) Explain the Principle of Hall effect and measure the displacement and current using Hall sensor.(7 marks) 7(b) Explain the working of a Multi channel DAS with block diagram.(7 marks) 8(a) Explain the measurement of phase difference using X-OR and SR flip flop(7 marks) 8(b) Where are Sample and Hold circuits used? Sketch the circuit arrangement along with output waveforms and discuss briefly the operation of the circuit.(7 marks)

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