I scored 147 marks in jee advanced. I'm from general res. Can I get vs or ECE or electrical in any old IIT

Not sure but don't worry. This year's paper was too difficult, so according to sources the cutoff is going to get lowered. So you might have a chance for your desired branch.

Hello Rahul,

Based on your marks your rank may lie between 5900 to 7000(Use the predictor tool to check).

https://engineering.careers360.com/jee-advanced-rank-predictor?icn=JEE_Advanced_rp&ici=JEE_Advanced_article_view_sticky

According to last year cut-offs you cannot get ECE or electrical branch in any of the old IIT's because these branches gets closed within 1000 ranks .But don't be disappointed because there are many branches which are available for you.

All the Best !