Physics ____ interesting.
Context Context Context people! It all depends on your context!
Math is interesting too. So is maths, and mathematics. Collective words.
Context has nothing to do with it. Without the definate article, Physics *is* interesting.
THE physics however, are interesting...
English is interesting but Mathematics is not so.
All physicists are good at phisics, but very few of them need phisic, which stimulates evacuation of the bowels