Is there any Phase difference between the current in primary and secondary coils of a transformer?
If I draw the diagram of a transformer, and try to find-out the direction of current using Lenz's law; if I keep the coiling-pattern of primary and secondary coils Same (Say both as righthand-screw, or both as Lefthand-screw); I'm getting an 'opposite', i.e. 180-degrees phase-shifted currents in the 2 coils.
is it the case indeed?
However I do-not know, in which-way Lenz's law acts in transformer; because the law states the induced current will try to hinder the cause. but when the secondary circuit of a step-up transformer turned On (closed) , so-far I've know , the current in primary-coil goes-up
However, since Amount of Induced-current depends upon CHANGE-rate of magnetic field (Faraday's law), => Amount of current induced in a secondary coil (at a moment), is proportionate with CHANGE RATE of current of the Primary coil;
NOT on the CURRENT in primary coil directly (though it apparently seems from the graph). So, same phase-state of primary coil and secondary coil means, in AC, the Graph for Current, and the graph for Change-rate of current, is same. I want to know also, am I right? because, if it was not, then surely a phase difference would found.