I'm a bit confused by this question, I know that if you substitute the last two equations into the first you get the impossible answer N1/N2=1 but I can't think of any other reason or a model. thanks!

Transformers are actually far more complicated than we are learning in first year - they have a lot of interesting behaviours and properties that you need complex numbers to model. We can see our 'simplitied' model of the transformer break down when we consider the following three equations at the same time: V1 N1 _ . . _ . _ . 1) The transformer equation F = T. which tells us that the voltage In the secondary cOiI is always a Simple product of the input voltage and the ratio of the number ofturns in each coil. 2 a 2) Ohms law. V = IR. which tells us that the voltage drop across a system is always equal to the current times the resistance of the system, 3) Power transfer. where P = VI and the total power on the secondary coil of a transformer can NEVER be greater than the total power in the primary coil. Could you outline why trying to consider all three of these equations as 'true' simultaneously can lead to impossible questions I multiple 'answers' to the same question? As a hint. you might like to come up with a Single example that shows this - pick some specrfic values for R, input voltage. coil ratio etc. that demonstrate that these equations can generate conflicting answers. Note that you do NOT need to explain what the more 'correct' model of transformers is! WEJUSt want you to be able to identify a problem in the model :}