IIT Roorkee - Indian Institute of Technology Answered Questions

First of all congratulations! I will recommend you to go with CSE from IIT Mandi, but in that case only if you have a keen interest in computer science and engineering. Placement wise it's very good also you will get very good exposure. IIT Mandi has very good semester exchange program too, you have a very good option there to go abroad and explore further. Else if you wish to go with core opt for the other options which are left.

IIT Roorkee offers admission on the basis of AAT (Architecture Aptitude Test).
AAT is an architecture entrance exam for admission into IITs. Moreover, for appearing in AAT you have to clear JEE Advanced also. To appear in JEE Advanced you should have cleared JEE Mains paper 1.

First of all congratulation for getting a decent rank in JEE Advanced.
Now you should decide which branch you want to pursue. If you are interested in civil then you should surely go for IITD. If interested in metallurgical branch, then go for IITB and if still wants to do mechanical, go for Roorkee.

Hello Hritik,
First of all congrats for securing good score in JEE Advanced, now coming to the choice of branches, you might not get branches like CS, especially if you are from general category. Briefly study the core subjects of all the branches, discover which subjects interest you. IT is very important to pursue a branch of your liking- you have to study it for 4 years and apply it's concepts in real life. Read about the branches and find out what you like.

The two options you gave, I would advise you to go with electrical engineering at IIT(ISM) Dhanbad. It is because your branch matters and certainly electrical is much better than geophysical and electrical is core branch too.
Electrical engineering students at IIT(ISM), Dhanbad has got decent placements in past few years. Since we got the IIT tag last year only, the number of companies visiting the campus is bound to increase from here on. You can check out the placement records at the official website of IIT(ISM) IIT (ISM) - Training & Placement. Also, non-core companies are visiting our campus for all branches such as Capgemini, Goldman Sachs, etc.
And, if your college matter to you, we are not a bad choice there too. Yes, IIT(ISM)-Dhanbad is not among old IITs but it is older than all the old IITs (established in 1926). The infrastructure is quite good and lots of things are coming up. It has a rich legacy and culture of its own and most importantly it has a very strong alumni base throughout the world. If you are interested in higher studies after graduation this alumni base helps a lot no matter from which department you are.
All the best.