I am sorry but the score is too less. U don't even qualify for advance with such a score. Try hard next time. U can't even get admission in the new nits which have considerably low cut offs .However if u are in st/sc category then you can get nit in your home state 

If you belong to ST category then with 50 marks you can get NIT with HS quota .But if you belong to general or OBC Category then it is not possible to get NIT with such score.you can qualify with marks if you belong to SC category.You can get seat in NITs  with this marks if and only if you belong to ST category.Few NITs and other engineering college will available in the marks of range 50-60 for ST category .You will get benefit of your category with Home state quota.

You can ask if you have any other queries.

GOOD LUCK