Hello Abhilasha,

As you know that the number of applicants in these exams are too high and so seats are filled very quickly. Now look there are three ways you can get admission into any college. First through  JEE main score, college entrance exam and through management quota. 

There are some good colleges where you can apply using your JEE marks, but try to be fast and apply for multiple colleges at a time. Try to keep your option open for now and keep reading reviews of other students, as it will help you to know more about the college education and placements. Check the following link for the colleges.

Https://engineering.careers360.com/tags/top-engineering-colleges-in-north-india-2015

Here you can check good colleges state wise. Now following will show you top colleges in whole North India. 

Http://www.eduvidya.com/Top-Engineering-Colleges-in-North-India

 Hope you find this information useful. Have a great future ahead.