Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Describe your view about piezoelectric generator.
Piezoelectric generator:
A slab of piezoelectric crystal is acquired and using that parallel plate capacitor is made. After that with other electronic components an electronic oscillator is designed to generate electrical oscillations > 20 kHz. Usually one can generate ultrasonic waves of the order of MHz by using piezoelectric generators. Quartz slabs are preferred since this possesses rare physical and chemical properties. As a typical circuit diagram is demonstrated below:
The tank circuit has a variable capacitor 'C' and an inductor 'L' that selects the frequency of the electrical oscillations. While the circuit is closed current rushes by the tank circuit and the capacitor is charged, after completely charged no current passes through similar. After that the capacitor starts discharging by the inductor and therefore the electric energy is into the form of electric and magnetic fields connected with the capacitor and the inductor respectively. Therefore we obtain electrical oscillations in the tank circuit and along with the help of the other electronic components with a transistor, electrical oscillations are produced continuously. It is fed to the secondary circuit and the piezoelectric crystal (into our case a slab of properly cut quartz crystal) vibrates, as this is continuously subjected to varying (alternating) electric field, and generates sound waves. While the frequency of electrical oscillations is into the ultrasonic range in that case ultrasonic waves are generated. While the frequency of oscillation is matched along with the natural frequency of the piezoelectric slab in that case it will vibrate along with maximum amplitude. The frequency generated is demonstrated below:
f = p/2l (√E/ρ)
Here p = 1, 2, 3, ..., l is the thickness of the piezoelectric plate, ρ- the density of the piezoelectric material and E- the Young's modulus of the piezoelectric material.
Illustrate "Tangent law" in magnetism. Compare magnetic moment of two bar magnet in a tan A, tan B position by null method or equal distance method.
The conductivity of an extrinsic semiconductor (A) Decreases with temperature. (B) Increases with temperature. (C) Remains constant with temperature. (D) Decrea
linear polarizers whose transmission axes make an angle of 45degree with each other,.The transmitted light intensity through both polarizers is what percentage of the incident inte
Three capacitors of capacitance 6µF each are available. Determine the minimum and maximum capacitances that could be acquired.
Speed of light (in vacuo); c The speed on which electromagnetic radiation propagates within a vacuum; it is described as 299 792 458 m/s.
According to uncertainity stationary orbits are accepted or not?please give reason Ans) According to uncertainity stationary orbits are not accepted because according to station
Write down differential equation of a forced oscillator related to an external periodic force. Set up the solution of it.
what is expansion of solids
An object is placed at a distance of 0.12m from a convex lens forms an image at a distance of 0.18m. Determine the magnification produced.
Explain the meaning of Nuclear Fusion Fusion happens when two light atoms like hydrogen or lithium combine. There is a net loss of mass which is converted to energy. The most f
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd