# Refrigerator magnets with four poles apiece

1. Jan 24, 2016

### Hornbein

I bought a couple of bar magnets at the local hardware store. They were acting so strangely. I couldn't figure out where the poles were. Finally I realized each magnet had four poles! They weren't quadropolar, rather half of each bar was magnetized one way and the other half the other way. The field is oriented towards the thnnest dimension of the bar, not the longest like in all of the diagrams. Pretty clever setup.

I suppose that a permanent magnet could have any number of poles greater than 1.

2. Jan 24, 2016

### PietKuip

3. Jan 24, 2016

### Hornbein

4. Jan 24, 2016

### mathman

Poles come in pairs.

5. Jan 24, 2016

### Hornbein

6. Jan 25, 2016

### mathman

7. Jan 26, 2016

### davenn

8. Jan 26, 2016

### Hornbein

It depends on how a magnetic pole is defined.

9. Jan 26, 2016

### davenn

no, look at the field lines in the image
I can see 4 distinct poles with an unknown area in the middle

10. Jan 28, 2016