Right now, I only understand that Global indexes on a partitioned table are for the whole table where as the local indexes are for each partition.
If so, Is the Primary Key also a Global Index?
What happens to the Indexes when a Partition is moved to some other table?
Yes, the primary key is a global index.
If some table data was moved to another partition, any indexes pointing to that data would be updated accordingly. (Is that what you meant with your last question?)