current flowing through a conductor is directly proportional
to the potential difference across the ends of the conductor
and inversely proportional to its resistance.
If V is the potential difference across the ends
of a conductor, R is its resistance and I is the current
passing through it then as per the Ohm’s law
I α V/R
or I = V/R
or V = IR
Where I is
the current in Amperes, V potential difference is volts and
R is the resistance of the conductor in ohms.
It can not
be applied to the circuits containing transistors.
It is not
applicable for the circuits containing non linear such as
electric arc and powdered carbon etc.