# If a magnet could switch, could it attract and repel?

zach_wildmind

Hello the first image with the letters going ABCD is picture #1 and then BACD is picture #2 for references.
Tools:
- Normal magnet. Nothing special about them.
- And we will say they have some type of system where they do not move sideways. Only up and down and have a difference of 5 cm when they are apart.

So here is the scenario. In picture 1 we have 4 magnets A, B, C and D. Magnets A and B are besides each other. Then C and D are completely parallel under A and B. I want to know that if there was a motor type of device that switched position of A and B to B and A (which becomes picture #2). I wanted to know that if after transition from picture 1 to picture 2 if the magnets would now become attracted or repelled if the transition was done.

Objective: I want to know this as polymagnets are expensive and big and was wondering if I compacted regular magnets in a certain way if I could get a similar result. Any help is greatly appreciated. Thank you!

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Staff Emeritus
polymagnets are expensive and big
I don't know the cost, but they can be very small. See the following video starting at 2:11

The video also discusses some obstacles, namely the relationship between spacing of the dots and thickness of the effect. Those are obstacles to the question you asked. So I think the answer to your general question is "Yes, you can make a DIY polymagnet. But no you can't design it with just a sketch, you need all the 3D dimensions, and distances, and magnetization, and permeability parameters to know if it will work or not."

zach_wildmind
I don't know the cost, but they can be very small. See the following video starting at 2:11

The video also discusses some obstacles, namely the relationship between spacing of the dots and thickness of the effect. Those are obstacles to the question you asked. So I think the answer to your general question is "Yes, you can make a DIY polymagnet. But no you can't design it with just a sketch, you need all the 3D dimensions, and distances, and magnetization, and permeability parameters to know if it will work or not."

Yes I have seen the video. And yes I do understand it is more than a 2D drawing on MS Paint. I just wanted to know before trying a step forward or if to think of something else. Also you are right some of the polymagnets are quite cheap however the ones I require (twist release) can not be smaller than 3/4 of an inch and become expensive around 4-7 $per magnet and my project requires around a couple hundred of them which made it quite unfeasible... However I found a lot of stores selling regular magnets as cheap as 20$ for 500 magnets that are small enough to make my project not a complete mess... Thank you tho for the video and I will look into more parameters of the magnets however. Thank you!