Olympiads are for students who have not yet passed.
The first round is regional level in which you qualify for a national round . around 50 students are selected from that who visit the camp and
among them few students are selected on performance basis for international round.
Truly speaking , as the director of one who conducted the camp few years back told me that NCERT book was enough for physics olympiad.
However, from the experience of people who have qualified , the recommended boos are resnik halliday and irodov.
For chemistry , morrson boyd,jd lee, atkins and NCERT.
And for math follow challenges and thrills in pre -colleges in mathematics.
The exams are generally conducted in nov-dec .It is conducted by IAPT,IACT.
