It varies from server to server, depending upon what setting the server has for g_maxForceRank:
g_maxforcerank
This tells your server what level of Force points are allowed in the server to be allocated to Force powers. The available numbers are as follows:
Or if it's in single player there are enough missions to fill 5 force powers (4 light/1 dark for example).
Meaning a total of 15 points to allocate. (3 points required to max out 1 force power)