Answer Posted / abdus sattar mollah

sensors: which can respond to a change in physical
parameter (in its surruonding) and produce a change in a
physical parameter that can be sensed.eg:when a peizo
electric crystal is supplied a potential difference then
its change its dimension.

Transducer:which convert an change in physical parameter
(involving some form of energy) into some USEFUL energy's
form.Eg:peizoelectric crystal with electrodes is a
transducer.

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