Past papers for the Edexcel Physics 2 exam can be found on the Pearson Qualifications website as of 2016. Papers from past years are available at no charge to students and teachers, although teachers have access to more recent papers than students do.
To access papers, go to Qualifications.Pearson.Com, and click on Support. Click on Past Papers, and scroll down to Edexcel Certificate. Click on the letter "P" for physics. Click on Physics.
Once in the Physics page, select from any of the past exam dates. Within each date, you can download the entire exam, or you can select Physics 1 or Physics 2 question papers, marking schemes or examiner reports.