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Questions and Answers
What happens when a voltage is applied between two plates sandwiching a piezoelectric medium?
What happens when a voltage is applied between two plates sandwiching a piezoelectric medium?
- The medium develops finite strain and induced polarization.
- The medium does not experience any change in shape or induced polarization.
- The medium is held to a constant shape, producing stress in the medium.
- The medium is free to expand or contract, leading to stress and strain. (correct)
What happens if the piezoelectric medium is held to a constant shape when voltage is applied?
What happens if the piezoelectric medium is held to a constant shape when voltage is applied?
- There is no induced polarization in the piezoelectric medium. (correct)
- The medium develops finite strain and induced polarization.
- The medium experiences a change in shape and induced polarization.
- The medium does not experience any change in shape or induced polarization.
In piezoelectric actuation, when the medium is free to expand or contract, what is the stress (T) and strain (S) in the medium?
In piezoelectric actuation, when the medium is free to expand or contract, what is the stress (T) and strain (S) in the medium?
- Stress (T) is zero, while there is finite strain (shape change). (correct)
- Stress (T) is developed, while the strain (S) is zero.
- Both stress (T) and strain (S) are zero.
- Stress (T) and strain (S) both have finite values.
In piezoelectric actuation with a hypothetically bound medium so that it cannot expand or contract, what happens when voltage is applied?
In piezoelectric actuation with a hypothetically bound medium so that it cannot expand or contract, what happens when voltage is applied?
What happens when the electrodes of a piezoelectric medium are shorted with an external wire for sensing with applied force?
What happens when the electrodes of a piezoelectric medium are shorted with an external wire for sensing with applied force?
What is the consequence of shorting the electrodes of a piezoelectric medium with an external wire during sensing with applied force?
What is the consequence of shorting the electrodes of a piezoelectric medium with an external wire during sensing with applied force?
In piezoelectric sensing with open circuit for an infinitely resistive piezoelectric medium, what does the induced polarization produce?
In piezoelectric sensing with open circuit for an infinitely resistive piezoelectric medium, what does the induced polarization produce?
What is the formula for the RC time constant (t) in the context of piezoelectric sensing?
What is the formula for the RC time constant (t) in the context of piezoelectric sensing?
What type of strain does a piezoelectric bimorph produce when used in extensional mode?
What type of strain does a piezoelectric bimorph produce when used in extensional mode?
How is the large displacement by bending obtained using a piezoelectric bimorph?
How is the large displacement by bending obtained using a piezoelectric bimorph?
What happens to the polarization directions for the two substrates in a piezoelectric bimorph?
What happens to the polarization directions for the two substrates in a piezoelectric bimorph?
What is the role of a bimorph in producing a large bending displacement?
What is the role of a bimorph in producing a large bending displacement?
In piezoelectric sensing with short circuit, what does the induced polarization attract through the wire?
In piezoelectric sensing with short circuit, what does the induced polarization attract through the wire?
What happens when a piezoelectric medium is infinitely resistive during sensing with applied force and open-circuited electrodes?
What happens when a piezoelectric medium is infinitely resistive during sensing with applied force and open-circuited electrodes?
How do electrons move from one electrode to the other in a piezoelectric medium?
How do electrons move from one electrode to the other in a piezoelectric medium?
What can be measured with a voltmeter in piezoelectric sensing with open circuit for an infinitely resistive piezoelectric medium?
What can be measured with a voltmeter in piezoelectric sensing with open circuit for an infinitely resistive piezoelectric medium?
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