PUPC was founded by Princeton physics undergraduates and is now run by Physics Unlimited, a non-profit of Princeton alumni, under the name Physics Unlimited Premier Competition — though Chinese-speaking families still call it the Princeton physics competition. It is an individual written exam: about four extended problems in 1.5 hours, each requiring a full derivation rather than a bare answer.
The organizers describe the scope as roughly equivalent to AP Physics 1, 2 and C, but problems typically push one level past the textbook setting, drawing on relativity, fluids, thermodynamics or astrophysics to test whether a student can deploy familiar tools in unfamiliar situations.
The exam has traditionally run on a November weekend worldwide, virtually proctored by default, with in-person sessions arranged by partner organizations in some countries. Awards are gold, silver and bronze certificates plus honorable mentions, all issued digitally. A separate team event, the Explorer Competition (PUEC), asks groups of up to six students to submit a written research report on an open-ended problem.
Important caveat: the last cycle formally posted on the official site was November 2023, so confirm the current year’s schedule with the organizers before registering.







