Recent content by magnetics

Thank you for your input, I can see where my misunderstanding is derived. Thanks for the image robphy, I got my own compass and magnets out and indeed the direction of the field lines go in the one direction. Iv'e drawn the field lines correctly, but it seems not the magnetic field vectors. But...

Thanks nasu. Does that mean the direction for the red magnetic field vector, which we call the south pole should be flipped 180 degrees? That would mean it's pointing in the same direction as the blue north pole, you sure this is correct?

Not exactly sure what you mean BvU. So would that mean my diagram is incorrect and if so do the magnetic field vectors from the north and south pole both point in the same direction or do the magnetic field lines change direction somehow when shown inside one half of the magnet?? TIA.

I might be a slow learner, but am still trying to understand the difference between field lines and vectors. I've got that magnetic field lines are symbolic and that the directional arrows applied (from north to south) are a convention. But see the attached image. The field lines form a closed...

Thanks Dale for clearing up the field/force description. The question however referred to the field, not the force. I’m trying to understand the similarity or difference in the origins of the two magnetic fields. For instance, in terms of the electrons traveling in the current, do they also...

The videos from Veritasium explaining permanent static magnets and electromagnets were quite good I thought… But they have me a little confused with regard to the origins of magnetic fields generated by an electric current as opposed to a permanent static magnet from say iron. 1. An...

Thank you kuruman, unfortunately not sure I follow. Might need a little more educating :) You mention, where the magnetic field (from the magnet matrix) is at an angle, is this mainly along the boundaries between the opposing pole magnets? That is, where the square magnets abut, the magnetic...

Hi, This YouTube video shows various shapes of pyrolytic graphite suspended on an alternating polarity matrix of square neodymium magnets. As I understand the principle of diamagnetic anisotropy, the stronger the external magnetic force, the stronger the induced repulsive force in the...

Right you are mfb. Thank you!

Hopefully this is a challenging maths problem for someone. This problem is to compare the surface area of the 4 identical circles with the circle overlayed drawn in pencil. The attached image shows 4 circles, each with diameter x. To solve the problem, I need to calculate the maximum separation...

Thank you mfb. I guess having vectors come from so many points makes it complex? If comparing the two fields, i.e. the field lines joining the adjacent magnetic body and the field lines joining the same magnetic body. Is there a significant difference in their properties and their effects on...

This question is regarding the magnetic field lines around two abutting alternating poles. Take two axially magnetised disc magnets and place them next to each other (like tangent circles), so on each side the adjacent or neighboring magnet is of the opposite pole. By sprinkling iron filings...

Hi, I was doing an experiment with Neodymium magnets and a long copper pipe (3cm internal diameter) to see Lenz's Law in action. At first I used a long bar magnet (about 15cm long) and there was little resistance to the magnet falling through the pipe. It was only slightly slower than a...

Magnetic field lines around multipolar magnets get quite complex. There are local field vectors and field gradients in the x, y, & z plane. In the following diagrams I have tried to illustrate field lines around a centrally (half and half) charged disc magnet. The top diagram represents the...

I would have thought this had more to do with homogeneous and inhomogeneous magnetic fields. Near the middle of the shaft of a long magnet, the field lines are straight and parallel and field is homogeneous. At this point along the magnet, the magnetic field is only going to exert a torque on...