What is electricity ?

What is electricity  ?

Electricity is nothing but energy. We know that energy neither be created nor be destroyed only it can converted into one form to other form . Before invasion of electricity there is only mechanical energy present. therefore all work are done by using mechanical machines but efficiency of mechanical machines is too low. Electricity was discovered by Benjamin Franklin in 1752. After that Michael  Faraday discovered the device that convert Mechanical energy into Electrical energy that is called generator this is one of the great invasion of faraday. before discovery of electricity work was done by mechanical energy e.g. steam engine, fuel engine etc. But know electrical devices replacing mechanical devices.

Main parameters of electrical  system are current, voltage and power.

Electric Charge : 

In easy word, we know that every element made up of atom and atom contains protons & electrons. when electric supply given to any wire or conductor electrons in it get excited and act as negative charge where as protons act as positive charge.

Unit of charge is Coulomb.

It is denoted by  Q 

Electric Current :

The rate of flow of charge through the conductor (wire) is called as electric current . Current is denoted by I . and its unit is Ampere.

It is given by,

                                 I  =  V/R

Electric Voltage :

The potential difference between two points is called as electric voltage and its unit is volt. it is denoted by V

It is given by ,            V =  IR

 

Before power we see one more concept that is Resistance

Resistance : 

Opposition to the flow of current is called as resistance. it opposes the flow of current through any conductor. Every conductor has its own resistance. As copper and aluminium has very less resistance therefore they are used in most of the wires and conductor. resistance is denoted by R and its unit is ohm. it is given by,       

                                     R = V/I

Frequency :

Generally Electricity is generated in alternating form positive half cycle and negetive half cycle (AC) that means continuously changing from On and Off form. This OFF-ON-OFF (yellow portion) is called 1 half cycle. Full cycle is yellow and green portion.

Number of cycle (positive & negetive) completed per unit second is called as frequency. In india frequency is 50 Hz that means 50 cycle completed in 1 second. 

Electric Power :

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.

Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries. It is usually supplied to businesses and homes (as domestic mains electricity) by the electric power industry through an electric power grid.

 It is denoted by P

its unit is Watt

It is given by ,

                                             P = VI

 

Generally Electricity is generated in alternative form positive half cycle and negetive half cycle (AC) that means continuously changing from On and Off form. That is called as AC. which is converted in DC (direct) for various applications. This concept will be covered in detail in the next blog.

This is all about todays topic. here I will share reports of various electrical projects that might be help you so stay connected! Stay curious !