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!
A VDR is a special type of resistor that changes its resistance with rise in voltage. It has a very high resistance at low voltage (below the trigger voltage) and very low resistance at high voltage (above the trigger voltage). It is also called varistor or voltage sensitive resistor. There are two types of varistor.
SILICON CARBIDE VARISTOR:-
MANUFACTURING: These are made up of silicon carbide. It is milled and mixed with a suitable ceramic binder. Then it pressed and extruded to desired shape of disc, rod or washer. Then it is sintered under controlled temperature to produce hard material. Wire leads are then connected.
METAL-OXIDE VARISTOR (MOV):
MANUFACTURING:
Zinc oxide and bismuth oxides are mixed with other powdered metal additives, pressed into discs and sintered at 12000C. It has an encapsulated polycrystalline ceramic body; with metal contacts and wire leads.
APPLICATIONS: A varistor acts as a switch. It is usually used for short circuit protection in power strips or lightning bolts "arrestors" on street power poles. It is also used as a "snobbier" in inductive circuits.
As electron hole pair (because of thermal collisions) is continuously formed in the depletion region. These are a regular flow of electrons in the direction of the N-side and of ho
The nucleus of the element having atomic number 25 and atomic weight 55 will contain : (1 )25 protons and 30 neutrons (2) 25 neutrons and 30 protons (3) 55 protons (4)
A bathtub is filled to the brim with ice cold water and has an iceberg floating in it. It's a big bathtub the iceberg, of course, project above the surface of the tube when the ice
Two particles execute S.H.M of same amplitude and frequency ,along the same straight line from same mean position.They cross one another without collision,when going in opposite di
Keplers Second Law After studying a wealth of planetary data for the motion of the planets about the sun, Johannes Kepler reasons three laws of planetary motion. Kepler's secon
Calculate the heat-removal factor and the duct flow factor for a collector having an overall heat loss coefficient of 6 W/ (m 2 .K) constructed of aluminum fins and tubes. Tube to
Path of a projectile The apparatus below can be used to indicate the independence of the horizontal and vertical velocities of a projectile. The projectile is a metal ball, and
INFORMATION ABOUT PRALLEL FORCE
In forced oscillation of a particle, the amplitude is maximum for a frequency ω1 of the force while the energy is maximum for a frequency ω2 of the force, then what is relations
Some sample
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