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.
Q) why we cant use the nuclear reactor concept in making fuel for our usages? Ans) Beacause nuclear reacters produse a huge energy which can''t be in our control and we can''t co
What are Solid core or multicore? It will depend on the use to that the optic is put and the actual installation conditions. Solid core optics has usually, a larger bending rad
what is the physics principle involved in the lens maker equation
Q. State the fundamental postulates of special theory of relativity? The two basic postulates of the special theory of relativity are: (i) The laws of Physics are the simila
What is curvilinear motion? Basically, it's any motion that's produced or bounded by curved -- as opposed to straight -- lines. In high school, curvilinear motion is usually
Magnetism: 1. There are two types of magnetic pole north and south. 2. Like poles repel and unlike pole attract each other. 3. Magnetic substance produce magnetic field.
A 20 Ω non-reactive resistor is connected in series with a coil of inductance 80mH and negligible resistance. The combined circuit is connected to a 200V, 50Hz supply. Calcula
Q. Helpful Henry's car is pushing Flat-tire Fred's car to the car shop. While the cars are accelerating up to 15 miles/hour Helpful Henry needs to push Fred's car with 60 N of for
how are "white dwarfs" explained in Fermi dirac statistics?
Two particles of equal mass m go around a circle of radius R under the influence of their mutual gravitational attraction.the speed of each particle with respect to their center of
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