Unanswered Physics Olympiad Questions

These are not doubts - I am just looking for simpler ways to solve these :- 1 > Given two plain - parallel electrodes , at a distance " d " , and kept at voltages " 0 " and " V0 " , find the magnetic field per unit length ...

Anyone have any idea, about where usually the INPhO is held in Kolkata? Which school or Institution? Where was it held in 2010?? ...

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