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Posted Date: 03 May 2009 Posted By: A santhosh Member Level: Diamond
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2006 Jawaharlal Nehru Technological University Electronics & Communications Engineering III B.Tech. I-Semester Examinations ELECTRONIC MEASUREMENT AND INSTRUMENTATION Question paper
1. a) Explain terms : i) Significant figures ii) Conformity.
b) How are random errors are analyzed ? Explain with examples.
2. a) Explain in case of DVM i) 3 1 / 2 digits, ii) 5 1 / 2 digits. What is the significance of 1 / 2 digit.
b) Explain about the conversion logic used in case of simultaneous type of A/D DVM.
3. Briefly explain the logic diagram of a binary synchronous counter and also explain the principle and operation of a cascading synchronous counter.
4. a) What is delay and briefly explain how do you measure the delay practically.
b) Distinguish between period and frequency measurements.
5. a) Draw the circuit of a Schering bridge and discuss its principle with the help of suitable derivations and phasor diagram at balance.
b) Write a note on the dissipation factor of a capacitor.
6. Write short notes on the following :
a) Electrostatic Deflection
b) Screens for CRTs
7. a) Explain with neat diagram the operation of ultrasonic method for measuring flow in a pipe.
b) what are the advantages & limitations of ultrasonic method of measuring flow.
8. a) Draw the optical spectrum. Classify it in terms of wavelength in nanometer.
b) Draw vacuum type photo emissive cell and explain its operation.
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