GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Electronics Measurement and Instrumentation
Time: 10:30 AM TO 01:00 PM Total Marks: 70
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- IV (New) EXAMINATION - WINTER 2019
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Subject Code: 2141003 Date: 12/12/2019Subject Name: Electronics Measurement and Instrumentation
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| MARKS | |
| Q.1 (a) Define: (1) Accuracy (2) Precision (3) Resolution | 03 |
| (b) Explain: (1) Gross errors (2) Random errors. | 04 |
| (c) Describe the classification of standards in detail | 07 |
| Q.2 (a) Explain the applications and limitations of Wheatstone bridge. | 03 |
| (b) Draw the circuit diagram of Kelvin bridge and derive the equation for unknown resistance. | 04 |
| (c) Draw the circuit diagram of Maxwell’s bridge and derive the equation for unknown Inductance and resistance. What are its advantages and disadvantages? | 07 |
| OR | |
| (c) Draw the circuit diagram of Hay’s bridge and derive the equation for unknown Inductance and resistance. What are its advantages and disadvantages? | 07 |
| Q.3 (a) Draw the circuit diagram of de-sauty’s bridge and derive the equation for unknown Capatance. | 03 |
| (b) Draw the circuit diagram of Schering’s bridge and derive the equation for unknown Capatance and resistance. | 04 |
| (c) An unbalanced Wheatstone bridge has following details: Ri= 1K,R>=2.5K;R3=3.5K,R4=10K,Rc=300Q, battery E=6V. Calculate the current through the Galvanometer. | 07 |
| OR | |
| Q.3 (a) A Maxwell bridge is used to measure inductive impedance. The bridge constants are: C1=0.01pF,R1=470 kQ,R>=5.1 kQ, R3=100 kQ Find the series equivalent of the unknown impedance. | 03 |
| (b) Draw the diagram of digital frequency meter and explain its working. | 04 |
| (c) Find the series equivalent inductance and resistance of hay’s bridge to null with the following bridge arms( clockwise ABCD): Arm AB: R1=2 kQ,C=1 pF, Arm BC: R3=1 kQ, Arm CD: unknown Ry and Ly Arm DA: R>=10 kQ o= 3000 rad/s | 07 |
| Q.4 (a) Draw the block diagram of a pulse generator. (only diagram, no description) | 03 |
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| (b) Draw the block diagram of pulse generator and explain its operation. | 04 |
| (c) Draw the circuit diagram of Wien’s bridge and derive the equation for unknown frequency. | 07 |
| OR | |
| Q.4 (a) Draw the block diagram of sweep generator. (only diagram, no description). | 03 |
| (b) Draw the block diagram of AF sine and square wave generator and explain its working briefly. | 04 |
| (c) Draw the block diagram of true rms reading volt meter and explain its working in detail. What are its advantages and disadvantages? | 07 |
| Q.5 (a) Draw the circuit diagram of basic wave analyzer and explain its working briefly. | 03 |
| (b) Draw the block diagram of function generator and explain its operation. | 04 |
| (c) Draw the block diagram of basic CRO and explain the function of each block. | 07 |
| OR | |
| Q.5 (a) Draw the basic construction of linear variable differential transducer(LVDT) and explain its working briefly. | 03 |
| (b) With diagram explain the working principle of spectrum analyzer. | 04 |
| (c) Draw the block diagram of digital storage oscilloscope and explain its principle of operation in detail. | 07 |
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