hi rahul

there is no compulsion for any engineering that you need a laptop. but having one will help you definitely.

the laptop will be useful for you incase of any presentation in college, or anything for research during project. it would make works easy. also you will use it for virtual circuit and making models in CAD softwares

the best (based on my opinion) laptop is HP i5 10th gen laptop. it has all facilities and also good power duration.

i hope it helps you