Basic Electrical Consept

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       Electricity is very important in our daily life.Today we generate electricity through wind energy, solar energy, hydro energy,geothermal energy, nuclear energy,diesel energy,coal energy and chemical energy,biomass energy, waste energy systems etc.
         Electricity generation depends upon geographical structure in our country.
          Our country is third in the world in production and consumption electricity.
 
  Definition of Electric current  
     Flow of electrons in a conductor is called Electric current. Or (the rate of charge flow is called current.)
     It's symbol is 'I' and measuring unit is Ampere. 
It is measured by ammeter.
          I= Q/T 
   Where 
                 Q- charge (Coulomb)
                 T-  Time (Second)
                  I- Current

Definition of electro motive force( EMF) OR Voltage
 EMF or voltage is the pressure that moves the electrons in a conductor .
      It's measuring unit is volt and measured by voltmeter. It's symbol is E Or V. 
     V= IR 
  Where 
           V- Voltage
            I- Current
           R- Resistance
  
Definition of Resistance
     Resistance is the property of a substance that gives opposition to current flow in itself.
     It's measuring unit is ohm and it's symbol is R.
Resistance is measured by ohmmeter, Wheatstone bridge meter or multimeter.
           R=V/I .

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