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A transducer is a device that

  • A.converts one form of energy into another
  • B.amplifies a small signal so that it may be displayed on an instrument
  • C.converts an analogue quantity into its digital equivalent
  • D.isolates a measuring circuit from the system being measured

Answer: A

In measurement the conversion wanted is usually from some physical quantity into an electrical one, because electrical signals can be amplified, transmitted and recorded conveniently. The device producing that conversion is the transducer.

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