It is usually advised to fill the choices as per the preference of colleges and departments, for example CSE in NIT Trichy is your priority followed by CSE in NIT Warangal, you can fill CSE at NIT Trichy at serial number 1 and CSE at NIT Warangal at serial number 2 and so on and so forth.

but the previous cut off of colleges should be taken in consideration, it is better to research over the cut off of colleges then make a preference list of colleges and fill accordingly

for the college preferences and the courses provided by these colleges and to know which colleges participate in the JOSAA counselling, please go to the below mentioned link: https://engineering.careers360.com/articles/josaa-participating-institutes/amp

Hello Dhashin,

It's great that you have chosen a very emerging and different field unlike others who always want to go for CSE related fields. Now in order to get into research field in Physics subject then you should be having grip over the basic physics knowledge for which I suggest you to join B.Tech (Engineering Physics) course from Delhi Technical University as per your rank in JEE Mains. You can surely get seat into DTU as per previous year cuttoff. Next after completion of B.Tech then go for Master Degree Course like M.TECH course from IIT or IISC and then finally do P.Hd.