When a compressive force is applied to a quartz crystal then ____________(a) positive charges are induced(b) negative charges are induced(c) no charge is induced(d) both positive and negative charges are inducedThis question was posed to me in a national level competition.My doubt stems from Piezoelectric Transducer in portion Transducers of Electrical Measurements

When a compressive force is applied to a quartz crystal then _________

1.	When a compressive force is applied to a quartz crystal then ____________(a) positive charges are induced(b) negative charges are induced(c) no charge is induced(d) both positive and negative charges are inducedThis question was posed to me in a national level competition.My doubt stems from Piezoelectric Transducer in portion Transducers of Electrical Measurements
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