Answer Posted / syed azam hussain

Transducers
[<Lat. Trans, across + ducere, to lead]
Devices to transform signals between different physical
domains.
Taxonomy
Active: input signal modulates output energy; e.g.
liquid crystal display.
Passive: input signal transformed to output energy;
Bidirectional, e.g. motor/generator;
Unidirectional, e.g. photodiode

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