JEE Main

Sorry to say, but it is not possible to get a good college through this score. You should try for direct admission in some good private colleges.

You should appear in JEE counseling and select list of colleges wisely. Include HBTU and Some good private colleges also. And, if you had given some other entrance exams. You should appear in their counseling too.

It is not easy to get a seat in NIT, Warangal but yes there are chances. You should choose college list wisely. I wish you will be there.
Best of luck.

You can check the list of colleges here. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Yes, you can definitely get admission in NIT Silchar, because of your caste. You rank is not too good but you can get admission for Electrical Branch.

NIT admissions based on JEE Mains will likely to be start from 8th of May, but this date is not fixed it can be changed so stay tuned for updates.

There is no specific answer to this there is nothing to do with JEE Mains rank for the rank in JEE Advanced A good rank in JEE Mains can't get you a good rank in JEE Advanced It depends on many aspects like difficulty of the exam, preparation by your son, his dedication, clarity of concepts, the study material and coaching/Institute he has referred for the JEE Advanced exam.

If you are getting more than 1 Lacs rank it will be quite hard for you to get admission in DTU or NSIT. But still try your luck as there will still be some seats left for you to grab.
All the best for your admissions in them just try your luck. Upvote if you liked my answer.

For getting a seat in not the percentile should above 96 percentile, so he cannot get a seat in Nagpur.

Your JEE Mains mark were good but as you failed in Maths, then you should study first for re exam. Then you should think about opting for colleges.