Bifilar coil's magnetic field strength vs. a normal coil's field

This is a quick experiment that I was interested in. A coil of speaker wire is connected to a D.C. power supply (battery charger), and the magnetic field strength is measured by degrees of deviation of a cheap compass. Then the exact same coil is connected in a bifilar configuration and the magnetic field strength is once again measured in the same fashion. It appears as if the bifilar configuration generates a stronger magnetic field. Wish I had known this before I made my electromagnet.

Category:

Science & Technology

Tags:

• Bifilar coil
• radial coil
• tesla coil
• magnetic field
• induction
• Direct current
• experiment

[rainmanferguson]

congrats on the experiment i love it when people like me are really at least trying. your experiment was right on. with dc the magnetic field should be almost twice as strong at the cost of almost twice the power. Tesla used his bifilar coil for the production of a scalar wave. its was designed to be flat (pancake) and to have high potential high frequency put through it to produce the scalar event. email if you would like more info im trying to find smooth round aluminum spheres to finish mine.

[jupy921]

Thanks. Even though I had read about such results; seeing it in person really strikes home. I had trouble finding Spheres, I had some luck with Stainless steel mixing bowls for different stuff. Most spheres I've run across are pricey.

[jupy921]

I am not sure, I didn't have any thing hooked up to measure the difference. I was just curious as to the difference in field strenght. Even if it does use more energy, which I would think it would, you still end up with a stronger field for the same amount of conductive material. Which is pretty neat. :)

[massware]

Congratulations! You demonstrated strongest magnetic field on bifilar coil! Do bifilar coil draw same current?

thanks.

[jupy921]

You know the more I think about it, the more I am curious now just how much more energy it would use. An excellent question.

[Films4You]

1:28 From Area 51, tool you the secrets of electro-power LOL

[kurdishmob]

i made one like yours. 100ft of 18 AWG wire bifilarly wound around a 4 cm core bobbin. In my case the magnetic fields canceled and i simply got more resistance ( as i suspected ). i dont know how u got a stronger magnetic field.

[lvildos]

I think the stronger magnetic field is due to having twice the Ampere*turns, not so much about being bifilar

[teslaresearch]

Good job! Nice experimental set up, I like how you had the locations of the parts outlined with marker(clever way to keep repeatability obvious for the viewers).

[massware]

TIP=> Easy and cheap way to Measure large Amps: => Wrilst exactly 31cm of comom 10 AWG cooperwire. Making a bobine and use as a shunt on a cheap digital multimeter (10 mOhm entrance impedance). Now we can mesure 200 Amp and dissipates 2500 Watts.

[pirondinimarco]

@massware I think that the current that coil draws in bifilar case is the double in ampere regard the exact same coil connected in the first test, like a parallel connection of many isolated wires in brushless motor, that make the motor itself more responsive.

[blaargenheimer]

I love your mascot! Bifilars are awesome.

[redclaw4444]

It would if it was wind with the two lines opposing each other.

[prototype9000]

theres a directional coil its a cousin of the bifilar coil and pretty powerfull there rare to see but exsist in automatic door openers pinball machines and such