# B Basic question about Halbach magnet array

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1. Mar 21, 2016

### berned_you

Can a magnetic Halbach array have less than three (i.e. two) magnets in the array? I can't seem to figure this out quickly with google. TIA!

2. Mar 21, 2016

### ProfuselyQuarky

I don't think so. How could you get the proper arrangement needed for a Halbach array?

3. Mar 21, 2016

### Staff: Mentor

I guess you can get something "halbach-like" with two magnets in a 90° orientation relative to each other. Won't be as good as an actual halbach array and you have to fill it with non-ferromagnetic material if you want to get a full bar, but it would have an asymmetric field.

What is the purpose of that?

4. Apr 5, 2018

### Pratyush21225

i have a question. What would happen if we put two strong sides of halbach array facing each other and with minimal distance between them?

5. Apr 5, 2018

### Staff: Mentor

They will strongly attract or repel each other depending on the orientation.

6. Apr 6, 2018

### Pratyush21225

Can you please explain the orientation???

7. Apr 6, 2018

### Staff: Mentor

If you put "N" of one next to "S" of the other and vice versa they will attract, if you try to put both "N" together they will repel. If you try other orientations you'll get torque towards the attracting orientation.

Is this a homework problem?

8. Apr 7, 2018

### Pratyush21225

Nope. I am asking coz I have making something for my school exhibition.