When piezoelectric materials are under pressure, the pressure causes changes along the surface of the material, these pressure differences result in compression along one surface and strain along the other one. As a result, the positive charges collect on one side of the material, and the negative charges collect on the opposite side. This generator effect converts mechanical energy into electricity. In the reverse piezoelectric effect, used in buzzers, applying an electrical field causes the length of the surface to change and converts electri ....etc

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A klystron is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian, which is used as an amplifier for high radio frequencies, from UHF up into the microwave range. Low-power klystrons are used as oscillators in terrestrial microwave relay communications links, while high-power klystrons are used as output tubes in UHF television transmitters, satellite communication, and radar transmitters, and to generate the drive power for modern particle accelerators. ....etc

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How does a lux meter works?
This may not be all about how it works, but some background is good too.A lux meter is a device for measuring brightness, specifically, the intensity with which the brightness appears to the human eye. This is different than measurements of the actual light energy produced by or reflected from an object or light source. The lux is a unit of measurement of brightness, or more accurately, illuminance. It ultimately derives from thecandela, the standard unit of measurement for the power of light. A candela is a fixed am ....etc

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Working principle
Deaerator
A
deaerator
is a device that is widely used for the removal of oxygen and otherdissolved / non condensable gases from the feed water to steam-generating boilers. Inparticular, dissolved oxygen in boiler feed waters will cause serious corrosion damage insteam systems by attaching to the walls of metal piping and other metallic equipment andforming oxides (rust). Water also combines with any dissolved carbon dioxide to formcarbonic acid that causes further corrosion. Most deaerators are designed to removeoxygen dow ....etc

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i want to know the operation, construction and working principle of universel motor.How it works.the names and description of the components of universal motor. ....etc

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Wiper Motor, the power source of the wiper blade, is the core of the whole wiper system. Therefore, the quality of the wiper motor must be guaranteed to ensure its performance. The wiper motor is a permanent-magnet direct current (DC) one. It is equipped on the front windscreen glass with the mechanical parts of the worm gear. The worm gear functions to slow down and increase torque. Its output shafts spur four-bar linkage, by which the movement is changed from rotary to swinging.

Three-brush structure is adopted to make speed change more conv ....etc

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