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Posted By: Sra1 Member Level: Diamond Posted Date: 27 May 2008
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2007 Jawaharlal Nehru Technological University B.Tech Biotechnology BIO-TRANSDUCERS AND APPLICATIONS (Supplimentary Examinations, Aug/Sep 2007) Question paper
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Set No 1
-----------------
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. Explain the following characteristics
(a) Linearity
(b) Accuracy
(c) Range
(d) Frequency response [4x4]
2. Show how a thermistor and strain gauge are used in instrumentation of bio signals
giving one circuit in each case with all details [8+8]
3. (a) Write note on chemical thermometry. [8]
(b) Explain the terms:
i. Radiation thermometry.
ii. Clinical thermometry [4+4]
4. (a) Describe in detail potentiometer transducers.
(b) A transducer with a sensitivity of 5
V/V/g is used to measure a 120-gram
force. Find the output voltage if an 8V D.C excitation potential is used. [10+6]
5. Write short notes on
(a) Elastic transducer
(b) Capacitive transducer.
(c) Optical transducer. [5+6+5]
6. How do you measure blood pressure? What are the methods and explain them in brief? [4+12]
7. What is the use of plethysmograph? Describe with circuit diagram. Find the
potential generated if blood flowing vessel with a radius of 0.9cm cuts a magnetic
field of 250 G. assume a volume flow rate of 175 cm3/sec. [2+8+6]
8. With a neat circuit diagram explain the operation of an instrumentation amplifier. Give the gain calculations [16]
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