Engineering Physics is one of the most intriguing research-oriented branches of IIT Delhi. Students of this branch get the excellent opportunity to work in top research centers like ISRO, Bhabha Atomic Research Centre. Eminent scientists and professors testify to the branch's credibility so need not worry about placements.
However, this branch is highly challenging and should be opted for only if you are serious about making a career out of it. The curriculum is challenging with high-level mathematics.
Students from most branches end up working in MNCs and leave soon because they are not satisfied. However, the Engineering Physics branch provides excellent job prospects. I know someone who chooses this branch over CS and Electrical despite his AIR being 10.
This branch requires serious commitment and one has to be truly devoted to the field. The faculty is not that good in comparison to other branches and this might make you suffer initially, but once you start understanding the practical concepts, it will become one of the most interesting courses you have ever come across.