This question about the variation of the aforementioned quantities in a transformer. Now according to me and my knowledge of electricity this is how I feel it should play out : If the input current were a sine curve that varies with time then : Input voltage = cosine curve i.e. it is ahead of input current by 90 degrees. Magnetic Flux = sine curve with same period as input voltage but LARGER amplitude. Output voltage = out of phase with input voltage by 180 degrees. Output current = this is where I'm faltering and I'm having issues.... Could someone please confirm what I've said is correct and help me with the bit in bold ?