Magnetic Field increases noticeably after using metal powder!

[BlueJellyBean]

Hello, this is more of a question then a topic, but i didn't know where to ask so I'm just gonna post it here

So today some workers came to my house and started cutting metal bars with a large machine. After they were done, there was a lot of metal powder on the ground, so I grabbed 2 magnets shaped like a ball and started gathering the powder, and then put it in a container. However there was still some powder on my magnets. It stayed there for 3~6 hours. I used water to try and remove it but it didn't work. So I left it to dry for an hour or two, when I came back I managed to remove it. And when I did. To my surprise the magnetic field of the magnets was much larger, the 2 magnets would act crazy if they're 20cm apart(they would either push each other, slowly come closer, or start spinning randomly) they never did that before. And also they had to be at least 5cm apart to react to each other, and 20cm? How?!

So the question is: why did the magnetic field become bigger?

[Sensei]

Hello, this is more of a question then a topic, but i didn't know where to ask so I'm just gonna post it here

So today some workers came to my house and started cutting metal bars with a large machine. After they were done, there was a lot of metal powder on the ground, so I grabbed 2 magnets shaped like a ball and started gathering the powder, and then put it in a container. However there was still some powder on my magnets. It stayed there for 3~6 hours. I used water to try and remove it but it didn't work.

The next time you should put magnet in foil or two.

It'll be much easier to remove iron dust.

 

So I left it to dry for an hour or two, when I came back I managed to remove it. And when I did. To my surprise the magnetic field of the magnets was much larger, the 2 magnets would act crazy if they're 20cm apart(they would either push each other, slowly come closer, or start spinning randomly) they never did that before. And also they had to be at least 5cm apart to react to each other, and 20cm? How?!

So the question is: why did the magnetic field become bigger?

It would be good to make video showing this reaction..

 

Do you more of them? Compare on video reaction between balls above mentioned, with original one.

Edited October 11, 2016 by Sensei

[imatfaal]

The next time you should put magnet in foil or two.

It'll be much easier to remove iron dust.

 

 

 

Exactly - or even better a small plastic freezer bag; you can then reverse the bag and have the stuff you have collected both free from the magnet and in a little bag.

 

 

It would be good to make video showing this reaction..

 

Do you more of them? Compare on video reaction between balls above mentioned, with original one.

 

Again agree - too easy to fool the eye if you do not have recorded evidence. You could even download Tracker which is a brilliant video mechanics / dynamics analyser