What is a transducer? How can we classify transducers? On what principles do the variable inductance type of transducers work? What are uses of LVDT for measurement? List uses of thermistors? What are active transducers ? Give an example. What is Hall effect? What is principle of photoelectric transducers? What is a Piezoelectiric transducer? Give advantages and limitations of foil strain gauges. What is gauge factor? (sometimes called scale factor) What is a Piezoelectric transducer? What are uses of LVDT for measurements? List out advantages of LVDT's Give its advantages and disadvantages of a peizzoelectric transducer. What are qualities a transducer should possess? What is a potentiometer ? What are various types of potentiometers? What is a strain guage? What are its types and applications? What are active transducers? What are thermocouples? What is their principle? What are principles on which inductive transducers work? What are thermistors? What are their applications? What are merits and demerits of LVDT? What are merits and demerits of capacitive transducers? What are peizzoelectric transducers ? Where are they used? What are passive transducers? Discuss working of a passive transducer.