From working at a university (and having studied and graduated at a different one previously, though in a subject much easier than physics) I would advise against cheating, The odds of being caught may be slim where you are from but if you do get caught you will be in a VERY bad way. Check out the consequences before making any such decision. Here if you are caught seriously cheating you are generally blocked from any future university study nationwide. You could always take another course should you fail this one, just change your major, it beats being barred from entry. Otherwise I would advise what Mchaza has already said.
Plus a lot of people feel like you do but then fly through the exams with amazing grades come the time, I used to do law before I realised it was dull and pointless (as I dont need the money and the practise of law is generally only about the money, plus the profession in this part of the world is way too regulated and restrictive) and I felt like you do now all the time before exams in that biut ended up getting almost straight A's ( I got one B in land law because it was too dull to take in arrgghh). You may surprise yourself...
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