Physics
The cutoff varies year to year so it would be tough to tell you the exactly. But with this score the chances are average to get admission in IIT Guwahati & Bhubneshwar. You can also prefer the article for IIT JAM cutoff with the given below link.
IIT JAM Cutoff
Yes, For M.Sc Physics also there is Viva- voice you require to give but it also depends to the college or University from where you are pursuing this.
Delhi University offers only M.Sc in Physics. It does not offer Radio Physics. You can also check the post Graduation programme of Delhi University.
Delhi University Post Graduate Programme
Good Luck!
Both are the good books but MTG is the best option for Physics. Firstly I would suggest you to prepare with the NCERT books to clear your basic concepts then prefer other books given below:
Biology Books for NEET Preparation: Objective Biology by Dinesh Pradeep Publication's BiologyBest Physics Books
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