Ferrofluid and magnets

[Minguillan]

We can see here how the ferrofluid changes its patterns due to the influence of one or two magnets:

[Sensei]

I see it's yours video.

So how about making couple tests?

f.e. instead of using permanent magnet, use electromagnet and variable resistor to control amount of current flowing through coil.

The higher current, the stronger electromagnet.

Then change polarization by swapping + and - in DC.

How about using small frequency AC for electromagnet (current will be flowing once in one direction, then in other, and it'll be changing polarization of electromagnet).

 

How about using wire through which current is flowing and surrounding container with ferrofluid.. ? So it'll be kinda like core in electromagnet.

 

Did you try if your fluid is passing current.. ?

[Minguillan]

Well, I didn't yet try to use an electromagnet with this ferrofluid. I have an idea about to dismount an speaker to bring closer the ferrofluid and to use a periodical acoustical signal, e.g. using Audacity.

 

It is not possible to open the bottle for safety reasons. When I have a ferrofluid that I can measure I will try to measure its conductivity. I mean to buy only the ferrofluid, not the complete kit that I have with magnets and bottle with ferrofluid and the other transparent liquid.

[swansont]

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[Natures Student]

Well, I didn't yet try to use an electromagnet with this ferrofluid. I have an idea about to dismount an speaker to bring closer the ferrofluid and to use a periodical acoustical signal, e.g. using Audacity.

 

It is not possible to open the bottle for safety reasons. When I have a ferrofluid that I can measure I will try to measure its conductivity. I mean to buy only the ferrofluid, not the complete kit that I have with magnets and bottle with ferrofluid and the other transparent liquid.

 

I'll save you the trouble. It's not conductive. While the principle material is a form of iron-oxide, they are nano particles that do not touch each other. The reason is they are encapsulated in surfactants that allow the iron to remain in suspension within the oil distillate that comprises most of the fluid.

Edited October 9, 2016 by swansont
Fix quote tag