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سؤال 314

What is piezoelectricity?

  1. The ability of materials to generate electromagnetic waves of a certain frequency when voltage is applied
  2. A characteristic of materials that have an index of refraction which depends on the polarization of the electromagnetic wave passing through it
  3. A characteristic of materials that generate a voltage when stressed and that flex when a voltage is appliedپاسخ درست
  4. The ability of materials to generate voltage when an electromagnetic wave of a certain frequency is applied

توضیح

Piezoelectric materials couple mechanical strain and electric field in both directions: squeezing or bending one produces a voltage across it, and applying a voltage makes it flex. The other choices describe radio emission, birefringence, and a photo-response, none of which is the piezoelectric effect.

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شروع تمرین
سؤال 314: What is piezoelectricity? · FCC Amateur Extra Class (Element 4) · Questena