I see that you have got 5200 rank in obc category and you want to persue Msc in Physics from IIT Roorkee. But it is too much to get admission in IITR. 

If I consider previous year closing rank then i found out that closing rank iin round 7 was around 4000. So it would be quite tough for you to get into IITR.You may try other colleges.

Thank You.