Bar magnets
What is the difference between 12,000 gauss and 14,000 gauss in their capacity to attract iron powder?
What happens when a lot of iron powder is poured over magnets bars of 12,000 gauss and 14,000 gauss? We conducted an experiment to check the results.
![baetest](/images/ec/magnetbar/bar0063.jpg)
![baetest](/images/ec/magnetbar/bar0066.jpg)
How much iron powder did the 12,000 gauss bar magnet attract?
The iron powder attracted by the 12,000 gauss bar magnet weighed 2,157g (approx.2.2kg) .
The thickness of the iron powder attracted by the bar magnet was approximately 70mm.
- Iron powder catches
- 2.2kg
![](/images/ec/magnetbar/magnet_bar_test_12000-gl.jpg)
How much iron powder did the 14,000 gauss bar magnet attract?
The iron powder attracted by the 14,000 gauss bar magnet weighed 2,485g (approx.2.5kg) .
The thickness of the iron powder attracted by the bar magnet was approximately 80mm.
- Iron powder catches
- 2.5kg
![](/images/ec/magnetbar/magnet_bar_test_14000-gl.jpg)
What is the adsorption capability distance for a 12,000 gauss bar magnet?
How far do the lines of magnetic force of a 12,000 gauss bar magnet reach? When we checked the results, we found that the bar magnet could attract iron powder that was 30mm away.
- Capture distance
- 30mm
![](/images/ec/magnetbar/magnet_bar_distance_12000-gl.jpg)
What is the adsorption capability distance for a 14,000 gauss bar magnet?
How far do the lines of magnetic force of a 14,000 gauss bar magnet reach? When we checked the results, we found that the bar magnet could attract iron powder that was 40mm away.
- Capture distance
- 40mm
![](/images/ec/magnetbar/magnet_bar_distance_14000-gl.jpg)
Experiment results
Below is a summary of the experiment results.
Surface magnetic flux density | Iron powder | ||
---|---|---|---|
Attraction capacity | Attraction range | Adsorption capability distance | |
12,000G | 2.2kg | 70mm | 30mm |
14,000G | 2.5kg | 80mm | 40mm |
![bartest](/images/ec/magnetbar/bar0085.jpg)
![bartest](/images/ec/magnetbar/bar0086.jpg)
![bartest](/images/ec/magnetbar/bar0087.jpg)
![bartest](/images/ec/magnetbar/bar0088.jpg)
![bartest](/images/ec/magnetbar/bar0089.jpg)
![bartest](/images/ec/magnetbar/bar0090.jpg)
![bartest](/images/ec/magnetbar/bar0091.jpg)
Differences in spatial magnetic flux density due to distance
The further away from the bar magnet, the lower the spacial magnetic flux density.
![マグネットバー01](/images/ec/magnetbar/bar0101.jpg)
![マグネットバー02](/images/ec/magnetbar/magnet_bar_gap_test.jpg)
Gap A |
30mm | 40mm | 50mm | 60mm | 70mm | 80mm | 90mm | 100mm |
---|---|---|---|---|---|---|---|---|
12,000G | - | - | - | - | - | - | - | - |
14,000G | 14,540G | 5,080G | 2,400G | 1,250G | 700G | 370G | 200G | 100G |