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.
What are the advantages of polymer fibers optics? The spectral transmission of PMMA fibers is not easy to enhance upon, the quality of the light transmitted over distances long
Projectile Motion - Falling to the Ground Projectile motion is the path followed by a ball when you throw it and it falls to the ground. You can change how hard you throw it (w
In case of dextro rotation we consider angle positive & in case of leavo rotatory we consider negative. But in Maths Rotation to left increases value of angle ( + ve)& towards righ
How would you describe in one word fiber optics lighting system? Magic is the one word for describing fiber optic in one word.
Describe an echo. What is the minimum distance needed to form an echo. Write its application.
A 4μF capacitor is connected in parallel with a 6μF capacitor. This arrangement is then linked in series with a 10μF capacitor. A supply p.d. of 250V is linked across the circ
The rope shown in the figure attached hereto is wound around a cylinder of of mass 4.0 kg, radius 10cm and I=0.020kgm2 , where I is the moment of inertia about an axis along the cy
While music is on you will try to oppose the two ear phone pieces to attract. Task-I: Will they attract? If yes, why so?
Any rigid body suspended from a fixed support constitutes a physical pendulum. Let Consider the situation when the body is displaced by a small angle Torque on the body about O is
distinguish feature of litearay writing
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