Hello Awanish
It would be difficult to tell you the marks required for getting rank under 200. You can check the previous year IIT JAM cutoff for reference and to have an idea about the rank required for admission to IIT Delhi.
According to the previous year cutoff, Closing rank for General category for Physics was 153 for IIT Delhi.
Go through the link below for previous year cutoff-
https://university.careers360.com/articles/jam-cutoff
Good Luck!
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