ahh okay
how come the right hand rule doesnt work for the heinemann diagram?
I just tried it with right hand rule. It does work. I think when I tried it earlier, I forgot that inside the solenoid: South to North and outside the solenoid: North to South. This makes sense if you look at the field lines.
I assumed that it would be north to south, which is what gave me the incorrect answer. But that assumption is what I made when trying that Lisachem question using the "pole method". Unless I determined the poles incorrectly. My mistake may have been in what I initially determined (X is clockwise, therefore south) and how I assumed that would be the outside pole.
I have no idea what I meant by outside or inside pole.
Let me restate it:
X is the south pole. Therefore Z is the north pole.
We are looking for the direction of the field inside. The direction inside will be south to north.
Therefore X to Z.
That makes sense now (I think).
So it seems by using the right hand rule, you figure out the middle field line i.e. the inside field. I looked over any questions I did similar to this one, and that seems to be what I've done - I just never thought about it in this way explicitly. That's where I was going wrong with the Heinemann diagram (assuming that what I've said in this post is all correct), thinking about this stuff in the wrong way (but coincidentally ending up with the correct answers when doing questions).
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