IGNOU PHE 13 2018 - What are transducers? Explain how a polymer capacitor is used as a hum

Question

What are transducers? Explain how a polymer capacitor is used as a humidity transducer.

27 Jan 2018

Answer :

Word Count : 293

A transducer is an electronic device that converts energy from one form to another. Common examples include microphones, loudspeakers, thermometers, position and pressure sensors, and antenna. Although not generally thought of as transducers, photocells, LEDs (light-emitting diodes), and even common light bulbs are transducers.

The humidity sensor is a small capacitor consisting of ahygroscopic dielectric mate- rial placed between a pair of elec- trodes. Most capacitive sensors use a plastic or polymer as the dielec- tric

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