What is piezoelectricity?
The correct answer is C: A characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied. What is piezoelectricity is a characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied. Piezoelectric materials convert mechanical stress to voltage and vice versa. For amateur radio operators, this is important for component knowledge. Understanding this helps when working with crystals.
Exam Tip
Piezoelectricity = materials generate voltage when stressed, flex when voltage applied. Think 'P'iezoelectricity = 'P'ressure 'E'lectricity (stress/voltage conversion). Piezoelectric materials convert mechanical stress to voltage and vice versa. Not electromagnetic waves, not refraction, not electromagnetic wave - just stress/voltage conversion.
Memory Aid
"Piezoelectricity = materials generate voltage when stressed, flex when voltage applied. Think 'P'iezoelectricity = 'S'tress/'V'oltage conversion. Piezoelectric materials convert mechanical stress to voltage and vice versa. Important for component knowledge."
Real-World Application
Piezoelectricity: It's a characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied. Quartz crystals used in oscillators exhibit piezoelectricity. This is what piezoelectricity is - stress/voltage conversion.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Ability to generate electromagnetic waves when voltage applied isn't piezoelectricity - piezoelectricity is stress/voltage conversion. Electromagnetic waves isn't piezoelectricity.
Option B: Incorrect. Index of refraction depending on polarization isn't piezoelectricity - piezoelectricity is stress/voltage conversion. Refraction isn't piezoelectricity.
Option D: Incorrect. Ability to generate voltage when electromagnetic wave applied isn't piezoelectricity - piezoelectricity is stress/voltage conversion. Electromagnetic wave isn't piezoelectricity.
题目解析
The correct answer is C: A characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied. What is piezoelectricity is a characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied. Piezoelectric materials convert mechanical stress to voltage and vice versa. For amateur radio operators, this is important for component knowledge. Understanding this helps when working with crystals.
考试技巧
Piezoelectricity = materials generate voltage when stressed, flex when voltage applied. Think 'P'iezoelectricity = 'P'ressure 'E'lectricity (stress/voltage conversion). Piezoelectric materials convert mechanical stress to voltage and vice versa. Not electromagnetic waves, not refraction, not electromagnetic wave - just stress/voltage conversion.
记忆口诀
Piezoelectricity = materials generate voltage when stressed, flex when voltage applied. Think 'P'iezoelectricity = 'S'tress/'V'oltage conversion. Piezoelectric materials convert mechanical stress to voltage and vice versa. Important for component knowledge.
实际应用示例
Piezoelectricity: It's a characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied. Quartz crystals used in oscillators exhibit piezoelectricity. This is what piezoelectricity is - stress/voltage conversion.
错误选项分析
Option A: Incorrect. Ability to generate electromagnetic waves when voltage applied isn't piezoelectricity - piezoelectricity is stress/voltage conversion. Electromagnetic waves isn't piezoelectricity. Option B: Incorrect. Index of refraction depending on polarization isn't piezoelectricity - piezoelectricity is stress/voltage conversion. Refraction isn't piezoelectricity. Option D: Incorrect. Ability to generate voltage when electromagnetic wave applied isn't piezoelectricity - piezoelectricity is stress/voltage conversion. Electromagnetic wave isn't piezoelectricity.
知识点
Piezoelectricity, Characteristic of materials, Generate voltage when stressed, Flex when voltage applied
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.