Download GTU BE/B.Tech 2019 Winter 4th Sem New 2140306 Biosensors And Transducers Question Paper

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Subject Code: 2140306

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER- IV (New) EXAMINATION - WINTER 2019
Subject Name: Biosensors & Transducers
Time: 10:30 AM TO 01:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Explain functioning of Chemoreceptors in Human body. MARKS 03
(b) Define Transducer, Sensor and Actuator with example. MARKS 04
(c) Explain Thermistor & Thermocouple transducer for body temperature measurement. MARKS 07

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Q.2 (a) Draw construction of Ionization chamber & explain its working principle for nuclear radiation detection. MARKS 03
(b) Explain any four static characteristics of Transducer. MARKS 04
(c) Derive the equation of Guage factor for Resistive strain gauge. Explain Resistive strain gauges with its applications. MARKS 07

OR

(c) Explain any two types of capacitive transducers with its working principle & applications. MARKS 07

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Q.3 (a) Write a short note on Pyroelectric thermal sensor. MARKS 03
(b) A strain guage is bonded to a beam of 0.15 m long and has a cross sectional area of 4 cm². Young’s modulus for steel is 207 GN/m². The strain guage has an unstrained resistance of 250 O and a guage factor of 2.2. When a load is applied, the resistance of guage changes by 0.015 O. Calculate the change in length of the steel beam and the amount of force applied to the beam. MARKS 04
(c) Explain any two types of inductive transducers with its working principle & applications. MARKS 07

OR

Q.3 (a) Explain construction & working of Photomultiplier cell for radiation detection. MARKS 03

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(b) Calculate the voltage generated across the electrodes of an electromagnetic blood flow probe applied across a blood vessel of 2 cm diameter. The magnetic flux density of probe is 1.5x10 wb/m². Assume volume flow rate of 180 cm³/sec. MARKS 04
(c) Enlist & explain various transducers for liquid level measurement. MARKS 07

Q.4 (a) Enlist various chemical transducers for the measurement of ions & dissolved gases. MARKS 03
(b) Explain construction of ISFET for glucose measurement. MARKS 04
(c) Explain construction & working of pCO₂ electrode for blood pCO₂ measurement. MARKS 07

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OR

Q.4 (a) Write a short note on Half-cell Potential. MARKS 03
(b) What is pH? Explain pH measurement technique. MARKS 04
(c) Explain construction & working of pO₂ electrode for blood pO₂ measurement. MARKS 07

Q.5 (a) Explain Potentiometric transducer for linear & angular displacement measurement. MARKS 03

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(b) Explain indirect method of Blood pressure measurement. MARKS 04
(c) Write a short note on Smart sensors. MARKS 07

OR

Q.5 (a) Write a short note on Hall effect transducer. MARKS 03
(b) Define Pneumotachometer. Explain basic working principle of Pneumotachometer. MARKS 04

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(c) Explain types of Thin film sensors in detail. MARKS 07

Date: 13/12/2019
Total Marks: 70