sir cant i get any core brach in dtu as i got 198699 rank in jee mains 2020 with ews quota delhi.
According to the category and rank you have mentioned in the question you cannot get any of the branches in DTU as per previous year's cut-offs. As we go through previous year's cut-off then it shows that last year the closing rank was 46953 for PCT branch in DTU under Home state quota for EWS category.
You can check out previous year's cut-offs from the link given below :-
But yes I would suggest you to sit for some other state counselling because in some of the state government colleges you can get admission on such ranks.
Note that the cut-offs are bound to change every year depending upon various factors.
So you can use JEE-Main College Predictor to predict your chances of admission in different engineering colleges of India :-
I hope this information helps you.