  We continue to investigate the effective potential between a pair of
D$p$-branes revolving around each other by using the technique of ${\it
partial\ modular\ transformation}$ developed in our previous work. We determine
the shape of the potential for general $p$ for a wide range of regions
interpolating smaller and larger distances than the string scale $l_s$. We also
discuss the backreaction of the D-brane system to the space-time metric and the
validity of our calculations.
