- #1
LentilSoup7
- 4
- 2
- TL;DR Summary
- equipment:- iron dust, a paper/card board to sprinkle the dust onto, a current generator, large CSA conductor orientated vertically
Thought of doing this one years ago!
Basically, I want to 'see' the magnetic force lines that surround a conductor when energized (with an alternating current).
I appreciate that what I will see (or at least I am hoping to see) is the pattern formed by the iron dust in response the the field lines being created. My understanding is that 'null' points will appear just like with a bar magnet- and I believe the interval/density of these null points (vs iron fillings) will be directly proportional to the amplitude of the AC current. Aka I expected to see smaller gaps between the iron fillings as the conductor current increases.
I know that an alternating current is just that, alternating/reversing- so I do have reservations that the net effect on the iron dust may not be noticable (current frequency will be 50Hz!)- but I am hoping that with a continuous current and thus continuous magnetic density that the iron will arrange itself accordingly. I guess I'll find out. [If not then I could try a Lead-acid battery to pass a DC current and then switch on and off the create and collapse the magnetic field!]
The plan is to arrange a vertical conductor that passes through the centre of a cardboard square, on top of the cardboard I will lay a thin sheet of paper, on the paper I will sprinkle the iron dust. As I apply a (small) voltage to the conductor a current will 'flow' and the magnetic field will excite the dust. The paper may need tapping for the iron to shift.
I will use a toroidal transformer controlled by a variac on the primary side and looping several turns of 25mm² copper conductor in order to drive up to approx. 130 Amps (at mV only). Hopefully this creates enough magnetic flux density T to excite and move the iron dust!
If anyone has performed this experiment (or similar) before or has any thoughts/suggestions on this then please let me know.
If I get some results as anticipated then I will follow up with observed results.
Stay safe - experiment at home :)
LentilSoup7
Basically, I want to 'see' the magnetic force lines that surround a conductor when energized (with an alternating current).
I appreciate that what I will see (or at least I am hoping to see) is the pattern formed by the iron dust in response the the field lines being created. My understanding is that 'null' points will appear just like with a bar magnet- and I believe the interval/density of these null points (vs iron fillings) will be directly proportional to the amplitude of the AC current. Aka I expected to see smaller gaps between the iron fillings as the conductor current increases.
I know that an alternating current is just that, alternating/reversing- so I do have reservations that the net effect on the iron dust may not be noticable (current frequency will be 50Hz!)- but I am hoping that with a continuous current and thus continuous magnetic density that the iron will arrange itself accordingly. I guess I'll find out. [If not then I could try a Lead-acid battery to pass a DC current and then switch on and off the create and collapse the magnetic field!]
The plan is to arrange a vertical conductor that passes through the centre of a cardboard square, on top of the cardboard I will lay a thin sheet of paper, on the paper I will sprinkle the iron dust. As I apply a (small) voltage to the conductor a current will 'flow' and the magnetic field will excite the dust. The paper may need tapping for the iron to shift.
I will use a toroidal transformer controlled by a variac on the primary side and looping several turns of 25mm² copper conductor in order to drive up to approx. 130 Amps (at mV only). Hopefully this creates enough magnetic flux density T to excite and move the iron dust!
If anyone has performed this experiment (or similar) before or has any thoughts/suggestions on this then please let me know.
If I get some results as anticipated then I will follow up with observed results.
Stay safe - experiment at home :)
LentilSoup7