Candidates who qualified the Joint CSIR-UGC NET exam held in December 2022 - June 2023 wouldn't be eligible to apply for PhD programs at IIT Delhi based solely on their NET score.

IIT Delhi conducts its own independent entrance exams and interview process for PhD admissions. Qualifying the CSIR-UGC NET doesn't automatically guarantee admission into an IIT Delhi PhD program.

The CSIR-UGC NET exam primarily serves as a qualifying exam for eligibility to apply for Junior Research Fellowship (JRF) and Lectureship positions in Indian universities and colleges. While qualifying NET can enhance your application for PhD programs, it's not the sole selection criterion.

https://competition.careers360.com/exams/csir-ugc-net

I hope it helps!