Ohm's Law

                                 Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

                                          
                                              
where:-
                       I      is the current through the conductor in units of amperes, 
                      V      is the voltage measured across the conductor in units of volts,
                      R     is the resistance of the conductor in units of ohms.