Question

Transducer is used to convert a _________

(a) physical quantity into an electrical signal

(b) electrical signal into a physical quantity

(c) physical quantity into a mechanical quantity

(d) physical quantity into a chemical quantity

I had been asked this question by my college director while I was bunking the class.

Question is taken from Analog Data Acquisition System topic in division Data Acquisition System of Electrical Measurements

Answer 1

Right answer is (a) physical quantity into an electrical signal

Easiest explanation: Transducer forms one of the most important components of an analog data acquisition system. It converts a physical quantity into an electrical signal. Strain gauge, thermocouples, piezoelectric devices are the most widely used transducers.