JEE Advanced

Either drop this year or prepare for IIT, else go for a good private college.

The weightage of JEE Advanced is not fixed. It can be of any marks. Almost every year the weightage is different.

With a rank of 7832 in JEE Mains, you can get a top NIT. Maybe Warangal, Surat, etc.
For the previous year, closing and opening ranks refer the link below:
http://josaa.nic.in/Result2016/result/OpeningClosingRank.aspx
In BITSAT, with a score of 315, you cannot get the electronics branch at Pilani camp

Almost every branch of engineering needs the application of physics. But try to make him choose a branch in which your son would love to work and has very much interest in. This will make it very beneficial for his career.

I think you can get top NITs with this rank.

Getting a college also depends on which category you are in. If they are following 60/40 pattern while preparing ranking list, so it will also depend on your 12th percentage. Fill JOSSA admission form properly. Do the research about colleges in your state and nearby states and cities and check their

Hello,
Yes, you can get good IITs by such a good rank. Please see the closing rank by JOSSA for different IITs by the link provided:
http://josaa.nic.in/Result2016/result/OpeningClosingRank.aspx

First of all, you should focus on NCERT books. For additional, you can go for HC Verma in physics, for chemistry, GRB publication's books are good and for practicing numerical, you can refer Arihant books but make sure that you should not have excess study material.

There is a subject wise cut off for JEE Advanced. For General candidates it is 10 marks in each subject. OBC NCL min marks are 9. If you score 10 then you meet eligiblity criteria.

Hello Pavan,
Please follow the link below to get rank details by your score in JEE Advanced:
https://www.shiksha.com/b-tech/resources/jee-advanced-rank-predictor
All the best.