JEE Main

If you are clear with your basics and your concepts are rigid, then half of the thing is done. Now coming to increasing your efficiency, you can practice more previous year question papers and questions from a particular book.
Best of luck.

Below mentioned is the order of preference:
1. Computer science and engineering.
2. Information technology.
3. Electronics and communication engineering.
4. Electrical engineering.
5. Mechanical engineering.
6. Civil engineering.

You need to keep your basic concepts clear. You should study from NCERT books for strengthening the basic concepts. Try as much application based problems as possible. You need to sit for 3 hours and in order to solve these problems. Try and solve all the previous years question papers.

You need to keep your basic concepts clear. You should study from NCERT books for strengthening the basic concepts. Try as much application based problems as possible. You need to sit for 3 hours and in order to solve these problems. Try and solve all the previous years question papers.

To get admission in NIT-Warangal, you need to score around 200-230 marks in JEE Mains.

Every competitive exams needs the concepts to be rigid. If you do not have some high class knowledge, then it will do, but if your basics are not clear, then it will be a trouble for you. Being a science student, you have chosen for JEE Mains, it means that you aspire to become an engineer.
Being passionate, you must have some basic knowledge. There is still time, you can devote more time to clear your concepts. You can practice more and enjoy while you prepare. I think you will gain interest in the subjects.
Best of luck.

If you belong to general category then you need to score more than 150 marks.

You need to keep your basic concepts clear. You should study from NCERT books for strengthening the basic concepts. Try as much application based problems as possible. You need to sit for 3 hours and in order to solve these problems. Try and solve all the previous years question papers.

You just need to get the basic concepts clear in physics and chemistry. You need to muggle formulas and reactions will be required in chemistry and mathematics. You need to focus more on concepts and formulas as it will help you to get a good score in Mains.