Is it weird that even after completing IGCSE course, I still don't understand clearly what a volt or emf is. 1V = 1J/C. I have a voltage of 5V and 100V. Does this mean that 1 coulomb of electrons in 5V have energy of 5J and 100V have energy 100J. What does it mean to have higher energy? Also, what makes something to be at a higher potential than other?
Or why is high voltage used in transmission (I have read bad explanations from teachers like heat lost = power = IR^2 etc. Just doesn't make sense. Power can also be written as V^2/R. Now what huh?). I don't understand how number of turns in a transformer affects the voltage either or what is meant by having stability in the nucleus of an atom.
None of this is in the syllabus or at least isn't clearly explained and whenever I try to understand the concepts, I get even more confused. I get it that Physics is a completely experimental field and stuff can't be rigorously proven using a set of axioms like mathematics but I don't even have the slightest intuition.
Am I the only one? Physics exam is in 3 days. I don't even expect any good questions to pop up.