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Which of the following is not a passive transducer?

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in Biomedical Instrumentation by (76.6k points)
Which of the following is not a passive transducer?

(a) Strain gauge

(b) Ultrasonic transducer

(c) IR sensor

(d) Doppler effect transducer

This question was addressed to me in a job interview.

The question is from Writing System topic in portion Recording System of Biomedical Instrumentation

1 Answer

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Best answer
The correct option is (a) Strain gauge

Explanation: Strain gauge transducer is an active transducer. Its working principle is based on a change in resistance. Ultrasonic transducers need power to operate. So do the IR sensors and doppler effect transducers.

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