  The responsibility of the electric field $E$ in the modification of the
nature of the space is proved. We investigate the way the fundamental strings
are related to supergravity background of D5-branes; i.e. once the endpoints of
the D-strings are electrified the flat space becomes curved. We study the
electrified relative and overall transverse perturbations of fuzzy funnel
solutions of intersecting $(N,N_f)$-strings and D5-branes in flat and
supergravity backgrounds respectively. As result the perturbations have a
discontinuity which corresponds to a zero phase shift realizing Polchinski's
open string Neumann boundary condition. And once the electric field $E$ is
turned on in flat space these perturbations decrease and when $E$ is close to
the critical value $\frac{1}{\lambda}$ the perturbations disappear forever and
the string coupling becomes strong. At this stage the space is considered
curved and the electric field is responsible for this effect. This phenomena is
also enhanced by the behavior of the potential $V$ associated to the
perturbations $\Phi$ on the funnel solutions under the influence of the
electric field. The potential goes too fast to $-\infty$ when $E$ goes to the
critical value $\frac{1}{\lambda}$ in flat space which looks like a kink to
increase the velocity for $\Phi$ to disappear. But in curved space and close to
the intersecting point we do not find any perturbation for all $E$ and there is
no effect of $E$ on $V$ and this is a sign to the absence of the perturbation
effects in supergravity background. This clarifies the existence of a relation
between the electric field and the supergravity background.
