This set of Basic Electronics Engineering Multiple Choice Questions & Answers (MCQs) focuses on “PiezoElectric and Photoelectric Transducers”.
1. Which of the following is the asymmetric crystalline materials?
a) Barium nitrate
b) Barium chloride
c) Sodium nitrate
d) Barium titanite
View Answer
Explanation: The barium titanite is the compound having the asymmetric crystalline materials. Quartz and rochelle salt are the other compounds having the asymmetric crystalline materials.
2. The dimensions of the asymmetric crystalline materials by applying ______
a) Electrical force
b) Magnetic force
c) Frictional force
d) Mechanical force
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Explanation: The dimensions of the asymmetric crystalline materials by applying the mechanical force. After the change in dimensions, the crystal produces the emf.
3. The change in dimension and production of emf in asymmetric crystalline structure is called ___________
a) Piezometric transducers
b) Photoelectric transducers
c) Pi-electric transducers
d) Electric transducer
View Answer
Explanation: The change in dimension of the asymmetric crystal material changes then the emf is produced. This property of the material is called Piezometric transducers.
4. In piezometric materials, the crystal is placed in between the _______ and force swimming.
a) Copper foil
b) Solid base
c) Silver foil
d) Metal foil
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Explanation: In piezometric materials, the crystal is placed in between the solid base and force swimming member. A pressure port is present from which the pressure is applied.
5. The emf produced by the crystal is directly proportional to the magnitude of the applied _________
a) Magnetic field
b) Electric field
c) Pressure
d) Flux
View Answer
Explanation: The externally applied force exerts pressure on the crystal. So, it produces the emf which will be directly proportional to the magnitude of the applied pressure that is produced due to the force applied.
6. The piezometric transducers are used in the _______
a) Low frequency oscillators
b) High frequency oscillators
c) Low frequency accelerometers
d) High frequency accelerometers
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Explanation: The piezometric transducers are used in the high frequency accelerometers. The piezometric transducers at high frequencies give a good response. As, they have good quality responses at the high frequencies, they are used in high frequency accelerometers.
7. Piezometric transducers are also called as ________
a) Generating transducers
b) High frequency transducers
c) Low frequency transducers
d) Dissipation transducers
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Explanation: Piezometric transducers are also called as the generating transducers. It needs external electric energy. So, it needs external energy source.
8. The piezoelectric transducers cannot measure the static conditions.
a) True
b) False
View Answer
Explanation: The piezoelectric transducers cannot measure the static conditions. The output voltages is affected by the temperature variations of the crystal.
9. The photo electric transducers are also called as ________
a) Opto-quantum transducers
b) Optoelectronic transducers
c) Photo- chemical transducers
d) Photoelectronic devices
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Explanation: The photo electric transducers are also called as optoelectronic transducers or optical transducers. It uses light as the external energy source.
10. The _________ of the incident light on the photo sensitive cathode is is varied according to the applied external force.
a) Quality
b) Quantity
c) Intensity
d) Quality and quantity
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Explanation: The quantity of the incident light on the photo sensitive cathode is is varied according to the applied external force with the help of the changing the anode current.
11. The photo electric transducers measure __________
a) Static phenomena
b) Dynamic phenomena
c) Static and dynamic phenomena
d) Electric phenomena
View Answer
Explanation: The photo electric devices measures both the static and dynamic phenomena. It has high efficiency. It does not respond to the high frequency light variation.
Sanfoundry Global Education & Learning Series – Basic Electronics Engineering.
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