  We have studied the transition in shape of two dimensional polyampholytes
using Monte Carlo simulation. We observe that polymers with randomly charged
monomers get into a globular shape at lower temperatures, provided that their
total charge is below a critical value $Q_c$. Collapse into globular form
happens for all forms of force law, but the critical charge depends on the form
of the force law, inversely dependent on the range of interaction. The value of
the critical charge is proportional to $N$, the size of the polymer, in the
thermodynamic limit. PACS numbers: 36.20.-r, 35.20.Bm, 64.60.-i
