Since you have 50 percentile in your JEE mains and also you belongs to PWD reservation category so below I'm mentioning the colleges in which you can take admission;

• Thapar Institute of Engineering and Technology
• NIT, Srinagar
• University Institute of Engineering and Technology, Chandigarh
• Shaheed Bhagat Singh State Technical Campus, Ferozpur
• Assam University, Silchar

Etc.

Also you can take help of the below mentioned link to predict your college with your percentile with your category (link mentioned below);

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna

Thank You.