  We consider the three-nucleon system within an effective theory with contact
interactions at leading order in the large scattering length. We calculate the
charge form factor of the triton at low momentum transfer and extract the
triton charge radius. At this order, no two-body currents contribute and the
calculation can be performed in the impulse approximation. We also comment on
the power counting for higher orders. The requirement of a three-body force for
renormalization of the three-nucleon system explains the previously observed
correlation between the triton binding energy and charge radius for different
model potentials.
