I think that is because, by Lenz's Law, induced magnetic field opposes the change in the external magnetic field. So in the loop, as external B increases, the induced current will be anticlockwise.
Hello Raja, I have uploaded video on chemically equivalent and magnetically equivalent nuclei in NMR. Below is the link for the same: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Pe4qQUWgqaw.html