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________________ material employed for making diaphragm to measure pressure.

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________________ material employed for making diaphragm to measure pressure.

(a) zirconate titanate

(b) barium titanate

(c) tourmaline

(d) phosphor bronze

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Asked question is from Implantable Telemetry Systems in chapter Biomedical Telemetry of Biomedical Instrumentation

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Correct choice is (d) phosphor bronze

To explain: The motion of the diaphragm is measured in terms of electric signals. Tourmaline, barium titanate and zirconate titanate are piezo electric materials.  Phosphor bronze is used to make diaphragm to measure pressure.

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