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Posted By: Nitin Bajaj - Editor Member Level: Diamond Posted Date: 14 Apr 2008
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2007 Jawaharlal Nehru Technological University B.Tech Applied Electronics and Instrumentation ELECTRICAL AND ELECTRONICS MEASUREMENTS (Instrumentation & Control Engineering) Question paper
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II B.Tech I Semester Regular Examinations, November 2007 ELECTRICAL AND ELECTRONICS MEASUREMENTS (Instrumentation & Control Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
1. (a) With the help of a neat sketch explain the principle and working of permanetmagnet moving coil(PMMC)de?ection mechanism. Derive the expression for torque developed. [2+2+4+4] (b) Explain about Ayrton shunt used in ammeters. [4]
2. Explain in detail the principle, working, and constructional details of current transformer and potential transformer. [8+8]
3. Draw the block diagram of a dual-slope digital volt meter and explain how it is advantageous to use dual slope A/D converter in DUM? [4+8+4]
4. Draw the basic block diagram of a vector impedance meter. Explain the functions of each block. Also give the speci?cations of the above meter. [6+6+4]
5. (a) With neat circuit diagram, explain the function of associated circuits that are used for CRT operation. (b) Explain how the light is emitted on the screen of a CRO. [10+6]
6. (a) Explain the working function of secondary emission circuit with a secondary emission curve of storage oscilloscope. (b) Explain the working function of secondary emission circuit with ?oating target with a secondary emission curve of storage oscilloscope. [8+8]
7. Describe the circuit diagram and working of a laboratory type square Wave and pulse generator. Explain the working of a current source. [6+6+4]
8. (a) Explain the basic principle and working of an electronic frequency counter. Also explain how period can be measured. (b) List the detailed speci?cations of electronic frequency counters
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