Branch change in IIT Roorkee depends on the specific circumstances and the branch you are looking to change to. In general, it can be a complex process that involves meeting certain requirements and going through an application and review process.
The entire process is easy and difficult at the same time as it requires serious dedication and determination you had while preparing for JEE. You will have to keep yourself away from distractions to be able to achieve this. This might sound easier than done. So it’s better to train yourself to be disciplined and motivate yourself for branch change.