D92930
D92930
THIRD SEMESTER (CBCSS-UG) DEGREE EXAMINATION, NOVEMBER 2020
Electronics
ELE 3A 12-GENERAL COURSE II: SENSORS AND TRANSDUCERS
Time Two Hours and a Half Maximum 80 Marks :
Section A (Short Answer Questions)
Answer at least ten questions.
Each question carries 3 marks. All questions can be attended.
Overall Ceiling 30.
1. What is a transducer ? Give an example.
2. What is the difference between sensors and transducers?
3. Define the sensitivity of a transducer.
4. What are the static characteristics of a transducer? 5. What is the difference between primary and secondary transducer?
6. Explain the loading effect of a potentiometer.
7. What is an IR sensor? What are the applications of IR radiation sensors?
8. What is the effect of the temperature coefficient of resistance in strain gauge measurement?
9. Write short notes on Photovoltaic cells.
10. RTDs are commonly made of doped platinum. Why?
11. What is a sound level meter? What are its different parts?
12. What is the basic principle of working of Hall Effect transducers ?
13. How does an orifice plate flow meter work? 14. What is meant by transduction? Explain.
15. Write a note on the application-based classification of sensors.
(10 x 3 = 30 marks)
Section B (Short Essay Quetions)
Answer at least five questions.
Each question carries 6 marks.
All questions can be attended.
Overall Ceiling 30.
16. Distinguish between active and passive transducers with example.
17. With a neat diagram, explain the working of capacitive transducers based on the change in distance between the plates.
18. Explain the working of an unbonded strain gauge.
19. Explain capacitive level gauge for discrete level measurement.
20. Explain Bernoulli's principle and continuity equation.
21. How does a rotameter measure a flow?
22. Explain the working of photodiodes in sensors.
23. Explain any two dynamic characteristics of a transducer.
(5 x 6= 30 marks)
Section C (Long Essay Quetions)
Answer any two questions. Each question carries 10 marks.
24. With a Schematic diagram explain the construction and working of LVDT.
25. Explain the construction of the venturi meter and its working.
26. Explain the principle and working of the thermistor. What are the different types of thermistors? What are its applications?
27. With suitable diagrams explain the working of any one type of manometer.
(2 x 10 = 20 marks)
നിങ്ങൾക്ക് ഉപകാരപ്പെട്ടെങ്കിൽ നിങ്ങളുടെ കൂട്ടുകാർക്ക് കൂടി ഷെയർ ചെയ്യുക
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