sir , which is better iit patna electrical or nit warangal cse?

The question is very broad in its respect. You need to narrow your hunt on the basis of academics , placements, scope of research , SAC(Student Activity Centre) and other fractions . Apart from all of this your inclination is most important whether you like Electrical Engineering or Computer Science .You can check on their respective websites to know more specifically

NIT WARANGAL CSE “http://www.nitw.ac.in/departments/cse”

IITPELECTRICAL ENGINEERING “http://www.iitp.ac.in/index.php/schools-and-centers/engineering/electrical-engineering.html”