IEM is best for its non-core (CSE/IT/ETC/ECE) placements comparatively that of core ones (CIVIL/MECHANICAL/ ELECTRICAL). Situated in the heart of the IT sector business area the companies visiting the campus for recruitment are mainly software companies.
The IT sector has seen a slump, the core placement doesn’t reach up to the mark. But, if you do choose electrical you may have an extra opportunity to sit in both the core and non-core.
But choosing a branch totally depends upon you. If you really like CS or IT there is no reason to not to choose IEM; or any other branch you like. After all, it’s you who is going to adapt the particular field and enhance yourself in it in four years of time.
I sincerely hope you take the right decision and choose the branch which is best for you and not go with the flow and take the branch which stats say is the best branch in IEM.