Lot of complex math(Think differential equations,multivariable calculus ,advanced functional and graphical analysis).Colleges generally don't teach the math part properly so if you're weak or slow stay away from this branch.You need to mug up a lot too.SAS,DSP and communication subjects are 95% math.(these subjects form 60% of the btech syllabus) Also forming a career in core domain requires both good domain theory and practical knowledge(this is true for all core branches),in CS at least as fresher level you need only decent basic knowledge of subjects(CN,OS,DBMS) but good practical knowledge.This is why in tier2 colleges most students shift to IT domains This makes core branches a much harder nut to crack.In my college ECE students are the most workaholic ones(most of them who actually were interested in it completely lost it after 3 years),their club and Extracurricular participation is the lowest as most of them have to study both their course and learn skills for software jobs(believe me this is seriously mindbogglingly time intensive Join Electrical related branches only if:1)ECE is like MBBS just like only having it won't actually make you a doctor you 100% have to do some specialisation (which is even harder than NEET-UG)take it only if you are ready to study and master them so much so that you 100% are going to masters/PHD in it. ii)Read the subjects,see the textbooks do you like doing circuit analysis(like complex analysis not your KCL KVL stuff) or want to work in analog domain(which has very very few job opportunities) Bottomline unless and until you want to do ECE and nothing else(no matter how hard it gets) don't even think of taking this branch.Take CS and you will thank yourself after few years(It also has its own set of challenges but that is for another day) You either hate ECE or love it there is no in-between remember this.If you are even slightly doubtful I highly doubt you will get something meaningful out of it

Bro who said vit chennai is tier-2?