- #1
MalachiK
- 137
- 4
Today I took two coils and connected one of them (coil A) to an AC power supply. I held the second coil (coil B) close to the first one and then connected them both to a dual trace CRO. As expected, an emf was induced in coil B and the traces on the scope were 90 degrees out of phase. As I understand it, this is because the induced emf in B depends on the rate of change of flux produced by A. So far so good.
Next, I connected up an iron core transformer and looked at the primary and secondary coils on the scope. This time, both of the traces were in phase.
As far as I can see, the only difference between these two situations is the iron core. I have some vague ideas about what is going on, but then again it's just as likely that I miss read the scope.
Would someone be kind enough to point me in the direction of an explanation of what's going on here?
Next, I connected up an iron core transformer and looked at the primary and secondary coils on the scope. This time, both of the traces were in phase.
As far as I can see, the only difference between these two situations is the iron core. I have some vague ideas about what is going on, but then again it's just as likely that I miss read the scope.
Would someone be kind enough to point me in the direction of an explanation of what's going on here?