Voltage

• In simple word,we can say that 

                  
                 Voltage=(no. of electrons at starting of )  - (no. of electrons at ending of )                                                          terminal                                          terminal


> voltage means electric potential energy per unit charge.unit of voltage is 

     joule per coulomb.

•  in any terminal if we enter suppose 2000 electrons but due to resistance in path at the end     of terminal if we get 1500 electrons than the difference of that electrons is denoted by potential difference more simply voltage.

    

 → In figure symbol of voltage that we generally use in our

      electrical circuit is shown over here. + sign indicate 
      that terminal is at higher potential compare to other one.



→In our Electrical circuit generally we take one terminal is ground        and other terminal as require potential.