Tamanna, with just few days left for the board exams, it is a good idea to guage your preparation by solving the previous years' papers. It will help you get an idea of the question paper pattern, marking scheme, time management techniques, etc

You can find the previous years' papers of HPBOSE for class 12th board exams on the given link: https://school.careers360.com/articles/hp-board-12th-question-papers

You can also get the model papers from the given link: https://school.careers360.com/articles/hp-board-12th-model-papers

You can go to the table of subjects, select Physics and click on the download link next to it. Similarly you can get the previous years' papers and model papers of other subjects like Chemistry, Biology, Mathematics and English. Hope it helps.