Solution to IPhyC 2025 Qualification Round Problems

This document contains the solutions to the International Physics Competition 2025 problems. It is not the official answer key of the contest but has been prepared by Istiak Ahmed Mozumder. All solutions in this document are provided solely for students’ reference. Copying these solutions or submitting them to the IPhyC portal, whether in original or modified form, may result in action against the individual involved. Please use this document strictly as a reference and compare the solutions with the answers submitted by the participant.