A short dipole antenna with negligible thickness has a triangular current distribution given by I(e)(x',y',z')=I(o)(1-(2|z|)/(l)) where l is the length of the antenna. Show that the total current I flowing through the antenna is I(o)l/2.
(a) I=I(o)l/3
(b) I=I(o)l/2
(c) I=2I(o)l/3
(d) I=I(o)l