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Consider the following statements regarding Piezoelectricity:
- It is a phenomenon where an electric charge is generated in response chemical reactions.
- Piezoelectric materials are widely used in pressure sensors and accelerometers.
Which of the statements given above is/are correct?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements regarding Piezoelectricity: It is a ...
Piezoelectricity is what generates the spark inside a stove lighter which is quite wondering for the one who is observing it.
- The term “piezoelectric” originates from the Greek words “piezein,” meaning ‘to squeeze’, and “elektron”, for amber – a material known for its association with static electricity.
- Piezoelectricity is a remarkable phenomenon whereby some materials – including quartz, ceramics such as lead zirconate titanate (PZT), and even certain biological substances like bone and the tendons – can generate an electric charge in response to mechanical stress.
- This property is the result of their unusual crystal structures.
- Usually, the charges on atoms in the molecules that make them up are symmetric on two sides of an axis.
- When some stress is applied, the molecule becomes distorted and the asymmetry of charges gives rise to a small electric current.
- Some materials also display an inverse piezoelectric effect, where the application of an electric current induces a mechanical deformation.
- Applications
- Both direct and inverse piezoelectric materials are widely used in pressure sensors, accelerometers, and acoustic devices – where their ability to convert mechanical signals into electrical signals is crucial.
- It is also used in quartz watches.
- Piezoelectric transducers are common in ultrasonic applications, such as intrusion detectors and alarms.
- Piezoelectric devices are employed at AF (audio frequencies) as pickups, microphones, earphones, beepers, and buzzers.
- In wireless applications, piezoelectricity makes it possible to use crystals and ceramics as oscillators that generate predictable and stable signals at RF (radio frequencies).
Hence only statement 1 is correct.
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Community Answer
Consider the following statements regarding Piezoelectricity: It is a ...
Explanation:
Piezoelectricity:
Piezoelectricity is a phenomenon in which certain materials generate an electric charge in response to mechanical stress or pressure applied to them. This means that when these materials are deformed or squeezed, they produce an electric charge.
Statement Analysis:
Statement 1: It is a phenomenon where an electric charge is generated in response chemical reactions.
This statement is incorrect. Piezoelectricity is not generated in response to chemical reactions but rather in response to mechanical stress or pressure.
Statement 2: Piezoelectric materials are widely used in pressure sensors and accelerometers.
This statement is correct. Piezoelectric materials, such as quartz, are commonly used in pressure sensors and accelerometers due to their ability to generate electric charge in response to mechanical stress. This property makes them ideal for converting mechanical energy into electrical signals.
Conclusion:
Therefore, the correct statement is option 'B' - "2 only". Piezoelectricity is a fascinating phenomenon that has practical applications in various fields, particularly in sensing and measurement devices.
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Consider the following statements regarding Piezoelectricity: It is a phenomenon where an electric charge is generated in response chemical reactions. Piezoelectric materials are widely used in pressure sensors and accelerometers.Which of the statements given above is/are correct?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'B'. Can you explain this answer?
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