Each State is entitiled to AT LEAST one Represenative. This answer can be found in Article One , Section 2 of the U.S. Constitution.
it is determined by the population of each state
The House of Representative numbers are chosen by the population of the state. Each state gets one representative in the house for every 40,000 inhabitants of their own state. The Senate numbers aren't based on population. Every state gets 2 representatives in the senate.
The number of representatives that any state has depends upon the population of that state. The state of Montana has a relatively low population.
however many representative their are
Every state has at least one representative; the greater the population, the more representatives a state has. This is the purpose of the decennial (every 10 years) census; to reapportion the House of Representatives due to the changes in population.
NAGALAND is the state which has highest tribal population
At least one however they are alloted on the basis of population.
The state population decreases
There is no maximum, each state is assigned a number of electors based on its number of senators, which is two per state, and its number of representatives, which varies based on population based on the US census. Right now there are 538 total electoral votes.
Each state is guaranteed one representative to the US House of Representatives, regardless of the state's population.
The state's population increases.
It depend on the state population. As of the 2010 census each house district contains an average of 709,000 residents. It does vary from state to state due to rounding and every state gets at least one Representative. A State with less population like Wyoming with 563,000 population gets one Representative. On the other hand Montana, with 989,000 population still gets only one Representative because it is about 74,000 short of getting two. Each district within a State has to be approximately equal.