Physically, it means that at a
given concentration, Lm can be defined
as the conductance of the electrolytic
solution kept between the electrodes of a
conductivity cell at unit distance but
having area of cross section large enough
to accommodate sufficient volume of
solution that contains one mole of the
electrolyte When 
concentration
approaches zero, the molar conductivity
is 
known 
as 
limiting 
molar
conductivity and is represented by the
symbol L°m The variation in Lm with
concentration is different (Fig 2