The previous equations indicate that the amplitudes of the voltage and current vary as a function of distance on the line.
Wherever
or even multiple of
, the quantity in the brackets is maximum in the
voltage expression, and minimum in the current expression. That is wherever the voltage amplitude is maximum,
the current
amplitude is minimum.
Similarly wherever
, the voltage is minimum and the current is maximum
Note
The voltage and current variation at every point on the line is
only.
The distance between two adjacent voltage maxima (or minima) or two adjacent current maxima
(or minima) corresponds to
The distance between adjacent voltage and current maxima or minima corresponds to
We then say that the voltage and current are in space quardrature, i.e, when voltage is maximum the current
is minimum and vice versa.
or even multiple of
, the quantity in the brackets is maximum 
in the
voltage expression, and minimum
in the current expression. That is wherever the voltage amplitude is maximum,
the current
amplitude is minimum.
, the voltage is minimum and the current is maximum 
only. 
