 However, in 2014-15, HBCSE being busy in the organisation of IPhO 2015, India, OCSC was organised by IAPT, and held in New Delhi.Dates are usually from the end of May to the start of June.The team for the International Physics Olympiad is selected based on a rigorous procedure of theory and practical examinations (Normally, 3 each) at OCSC Physics.60% (240 marks) weightage is given to the theory exam, and 40% (160 marks) to the practical one, akin to that at the International Physics Olympiad.The difficulty level is similar to that found in the international olympiad.Topics such as relativity and thermodynamics, absent/not stressed upon in most Indian schools are covered.