You can get Class 12 Physics previous year question papers in a single PDF from online board resources. On Career360 you can download Bihar Board Class 12 past papers including Physics in PDF which covers several years and helps you practice for exams. These PDFs are good for understanding the exam pattern and types of questions asked. You can visit this Career360 link https://school.careers360.com/boards/bseb/bihar-board-class-12-previous-years-question-papers-pdf-download to download Physics papers from past years for free. You can also look for a combined PDF of Physics question papers from CBSE, Bihar Board, or other boards depending on your board.