"Would it be possible to make a liquid..." solved and explained

High School
Physics
Electromagnetism
Electromagnets

malaana5k

Answered question

2022-09-24

Would it be possible to make a liquid electromagnet using ferrofluid and Ferris sulfate liquid. Having the core be 3/4s of it be ferris sulfate and 1/4 be ferrofluid. Then just having a normal coil. Would that work and if it does would it be stronger then normal electromagnets?

Answer & Explanation

Carina Moon

Beginner2022-09-25Added 6 answers

If you start with a coil with nothing inside it then introduce a core of relative permeability

μ

the effect is to multiply the strength of the generated magnetic field by

μ

.
So in your case the strength of the field would depend on the relative permeability of your mixture of

25 %

ferrofluid and

75 %

ferric sulphate. The relative permeability of a ferric sulphate solution is going to be pretty close to water (i.e.

\approx

1

) so it depends on the ferrofluid.

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