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______________ is not a piezo-electric material.(a) quartz(b) rochelle salt(c) aluminium(d) barium titanateThe question was posed to me during an interview for a job.The question is from Implantable Telemetry Systems in division Biomedical Telemetry of Biomedical Instrumentation

Answer»

The correct option is (a) quartz

To EXPLAIN I would SAY: Quartz is the most STABLE natural crystal with high mechanical and thermal stability and has volume RESISTIVITY higher than 10^4 ohm-cm and small internal electric loss. Barium titanate ceramic is a ferroelectric crystal and has small voltage output. ALUMINIUM is not a piezo-electric material.



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