## What is Electrical Relay ?

what is electrical relay??It is the most essential component for protection and switching of various  control circuits & other electrical components. It react to voltage or current  by performing open or close the contacts or circuits.  Relay is an electrical switch that control a high ...Read More

## What is contactor ?

The magnetic contactor is an electrical switches (electrical controlled ) which is used for switching electrical power circuit. It work on  basic electromagnetic principles.It is not a protection device. It cannot used as a protection devices like circuit breaker etc.. The basic purpose of ...Read More

## What is Susceptibility ?

What is Magnetic susceptibility?? Susceptibility is  measure of how much a material will become magnetized in an applied magnetic field. Whenever matter interacts with magnetic field, an internal magnetization or polarization ( J  ) is created which  either opposes or augments the external field.  ...Read More

## Automatic changeover switch

Before we discussing Automatic changeover switch First of all we need to understand the function of changeover . A changeover switch is used to transfer a house electricity from the commercial power supply to a local generator or UPS when any  outage occurs. The ...Read More

## What is permeability?

what is permeability ?Permeability which is also called magnetic permeability, is defined as it is a constant of proportionality that exists between magnetic field  intensity and  magnetic induction This constant is approximately equal to  1.257 x 10-6 Henry per meter (H/m) in free space (a ...Read More

## What is Permittivity ?

what is permittivity??In electromagnetism permittivity which called absolute permittivity  is denoted by the Greek latter Ꜫ ( Epsilon). Ꜫ describe the amount of charge needed to generate one unit of electric flux in given medium The SI unit of Ꜫ is Farad/meter or F/m ...Read More

## What is Law of electrostatics?

Law of electrostatic comprise two laws First Law: Similar charge of electricity repel each other ,whereas dissimilar or unlike charges attract each other. Second law : The force exerted by two point charges Is directly proportional to the product of their strengths Is inversely ...Read More

## what is RLC Circuit??

In this section we will discuss about RLC Circuit??? Resistance                  Resistance is the property of a substance due  to which its oppose the flow of electron i.e electric current through it .The unit of resistance is Ohm (Ω ) Resistance in Series If ...Read More

## What is conductance??

Conductance  is an expression of ease with which electric current flow in a substance. In equation it is express in uppercase letter G. The Standard unit of G is Siemens which is abbreviated by S formerly known as mho. When one ampere current pass ...Read More

## Advantage of AC over DC

There is a lot of Advantage of AC over Dc but few advantages and disadvantages of AC over DC are given below. Advantage of AC Over DC The generation of a.c is more economical than d.c generation Advantage of AC over Dc is that ...Read More