The ring and the magnet question, am I right?

[silverpixeli]

Alright for those who have done this question and understand it I'd love to know if I'm right or not, I'm pretty certain I am but other people got different answers than me and that made me doubt myself, this is my weakest area in physics so confidence not high on this one too :P

Okay I'm talking about (last?) part of the question where it asked 'at what times was the ring at A, B and C, and gave us that at t=0 it was at A

EDIT: for those who haven't seen the question, there was a north-up bar magnet with a ring oscillating from above it to below it, like this:
A (initial ring position)

C  [Magnet, North up]

B (lowest ring position)
And we were also given a graph of the flux through it, a negative cos graph with a mean of 0.4 Wb and an amplitude of 0.2Wb that went for 2.5 cycles, I'll put a screen cap in when somebody scans the exam


So I said it's at A at t=0 and t=2, B at t=1 and C at t=0.5, 1.5, 2.5

My reasoning is this:
If you draw the field lines in on the diagram, they're concentrated most inside the magnet and slightly less concentrated at A and B, but they're always pointing up. If you consider the flux threading the ring at A and B, it's going to be the SAME, a certain amount up, and it's going to be MORE at C because the field is denser inside the magnet. Based on this, I said C was the max values on the flux graph and A and B were alternating minimums, hence my answers.

Please let me know if any of that doesn't make sense!

Other people got A at the minimums, B at the maximums and C at the half-way parts, where the rate of change of flux was a maximum. The constant changing between flux, change in flux and rate of change of flux in their explanations confused me and prevented me from understanding.

So please guys, some clarification would be fantastic :)

[mmlp2]

I used the same method and got the same answers, it's pretty logical.
hopefully it's correct!!!

[Apink]

That's what I said too.

[lzxnl]

Yeah, that was the line of reasoning I used as well; I had to do a double-take on the question because I went "wait flux on the opposite side of the magnet?" Convinced myself that the situation was symmetrical later.