Hello Aspirant,

As your general rank is 100000, it is expected that your OBC rank will be somewhere in between 30000.

Marks vs ranks varies every year depending upon many factors such as difficulty level of questions, no of students appear for the exam, no of students want to get the the same branch.

You can check out rank vs marks vs percentile from the below link:

JEE Main 2022 Marks vs Percentile vs Rank – Calculate Marks using percentile score (careers360.com)

Use this JEE college predictor to get list of colleges based on your score:

JEE Main College Predictor 2022 : Predict Colleges based on your JEE Main Rank (careers360.com)

Visit this page to get more information about previous year's college wise, branch wise cutoff:

https://engineering.careers360.com/articles/jee-main-cutoff

Hope this information helps you.

Best wishes!