Colleges in Assam

Well, there are not many good colleges for this particular course but to name the best, I would say Guwahati University and Dibrugarh University.
All the best!

As per the admission procedure, the 60% of seats are reserved for NE students based on merit ranking in JEE Mains and 40% for the rest through Joint Seat Allocation Authority (JoSAA).
The intake also includes admission to students under Self Supported Schemes (SSS) and State Rank Holders of (10+2) S

Currently, the AEC offers the following PG programs:
1. M.E. in Soil Mechanics/Geo technical Engineering
2. M.E. in Watershed Management and Flood Control
3. M.E. in Electrical Engineering
4. M.E. in Mechanical Engineering
Hence, M.Tech in Power system in not available at AEC.

Hi,
Eligibility-
45% marks at graduation level,Graduate in Education (major / honors) or any Other discipline.
Admission Procedure
Admission on the basis of the performance in the all India Entrance Examination held by the Tezpur University Entrance Examination Board in different parts of the country
For

Yes, Kaziranga University will definitely allow you to do it. Talk with them thoroughly. A private university has everything in their hands.

The cutoff depends on college and may be, it depends upon city and state.

It differs from college to college e.g. for JBIMS, cut-off is 99 percentile and it's comparatively low for Great Lakes.

Yes, in every university, you have to first do bachelor's then you are eligible to do masters. The terms and condition of the university clearly suggest you to first get your bachelor's done then apply for masters. They even ask for marks in your bachelor and degree too.