I am currently pursuing B.Sc. Physics (hons). Do I have to select any particular field of physics in my M.Sc. or I will be taught whole Physics in it?
After you complete BSC with physics, you can go for MSC physics. The subjects or topics taught in this 2 years course are classical mechanics, nuclear physics, geophysics, astrophysics, electromagnetism, matter electronics etc.,
You study all of them, but you do have a choice to select a particular topic or area of subject and complete your course in that specialisation.
Hope this helps.
Good luck!