  Recent data allow a new parametrization of the neutron charge form factor
G_En. A parameter-free quark model relation between G_En and the N->Delta
quadrupole form factor is used to predict the latter from the G_En data. In
particular, the neutron charge radius is related to N->Delta quadrupole moment,
while the fourth moment of G_En connects to the N->Delta quadrupole transition
radius. From the latter we derive an experimental value for the charge radius
of the light constituent quarks. Finally, the C2/M1 ratio in pion
electroproduction is predicted from the elastic neutron form factor data.
