British Physics Olympiad (BPhO)

British Physics Olympiad website contains a selection of BPhO questions by topic area, past papers and important notes to upgrade physics problem solving skills. 

Here you'll find sample problems ranging from astronomy to particle physics. It's a really good resource for physics olympiad preparation.

British Physics Olympiad Question Bank.
British Physics Olympiad Past Papers.
British Physics Olympiad 'Upgrade Your Physics'.

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