You should know all the main important points before starting exam preparation. They are as follows:-

1) cover your entire syllabus of NCERT books for         physics thoroughly.

2) Practice of derivation is necessary you should        practice all the important derivations at least          twice or thrice.

3) important graphs should be learn by you.

4) Note the weight age of each unit of Physics            subject.

5) You should know how to solve the numericals        and which formula is to be used.

6) Proper study plan should be made.

7) Revision is necessary.

8) Practice should be there for each in every type of question.

9) Solve previous year question papers.

For more information you can go to the link given below.

Link:- https://www.google.com/amp/s/school.careers360.com/articles/cbse-class-12-physics-preparation-tips/amp

I hope you got the answer.

All the best for your future!

Hello,

Here, are some of the tips which may help you bring good marks in your paper:

1. Thoroughly read the NCERT book. It is the most important book for Physics baord exam for class 12. Cover all the topics and be thorough with them.

2. List down all the formulas, derivations to help you while learning. Revise them again and again.

3. Try to understand the logic behind the derivations to learn them more easily and solve them in a better way during the exam.

4. Revision is must.

5. Most of the students face a hard time with numerical part, if you are one of them then start preparing early.

6. After finishing the syllabus, pick up the same question paper and start solving them like you are giving the paper to check your current position and work accordingly.