#homopolarity

[oldguydoesstuff]

Bored? Go build yourself a homopolar motor!

[wtfearth123]

A homopolar motor is built with a battery, a magnet and some conductive wire. The magnet provides a magnetic field that will interact with the magnetic field induced by the current in the wire.

A homopolar motor is a type of electric motor that uses a magnetic field to create motion. It is also known as a disc motor, a Faraday disk, or a disc dynamo.

The homopolar motor is made up of three main parts:

A battery: This provides the electrical current that flows through the wire.

A magnet: This creates the magnetic field that interacts with the current in the wire.

A conductive wire: This is the wire that carries the electrical current and interacts with the magnetic field.

The wire is typically shaped into a disc, and it is placed between the poles of the magnet. When the battery is connected to the wire, a current flows through the wire. This creates a magnetic field around the wire. The magnetic field of the wire interacts with the magnetic field of the magnet, and this causes the wire to rotate.

The speed of the homopolar motor depends on the strength of the magnetic field, the amount of current flowing through the wire, and the size and shape of the wire.

Homopolar motors are simple to construct and can be used to generate small amounts of electricity. They are often used in educational demonstrations and experiments.

Here is a diagram of a homopolar motor:

The battery is connected to the wire, which is shaped into a disc. The disc is placed between the poles of the magnet. When the battery is connected, a current flows through the wire, creating a magnetic field around the wire. The magnetic field of the wire interacts with the magnetic field of the magnet, and this causes the wire to rotate.

Thank you for reading! I hope you found this post informative. If you did, please share it with your friends and followers. 😊🙏

[taspastondiams]

Artist Atsuko Yukawa has crafts homopolar motor sculptures using wire and a battery. To build a homopolar motor, one needs a magnet on one end of a battery, and a free-standing conducting wire on top, thus completing the circuit. [📹 trill_yukawa]

[fireflyhwufanficwriter]

(New Dr. Stone fanfic chapter on AO3!) Chapter 35: Next Project

FANFIC TITLE: No Stone Unturned (39,000+ words)

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FANFIC TITLE: No Stone Unturned (39,000+ words)

FANFIC SUMMARY: (Senku/Kohaku.) How did the scientist fall in love with the lioness? A friendship- and science-focused retelling of Dr. Stone from Senku’s perspective.

FANFIC LINK: (I’ll put the AO3 link in the notes/comments :D)

PERSONAL MESSAGE: Hello and happy reading, fellow Dr. Stone fans! ^_^

—

EXCERPT FROM CHAPTER 35:

“…And you'll put those crafting skills to good use. One of those pieces of leather shows the wooden molds you need to make the glass blocks. The last time we used wooden molds was when we made the Faraday discs-"

"Faraday disc?" "What's that?" asked Chrome and Kohaku in unison.

"The copper disks that Kinro and Ginro spun so we could make electricity - they're called Faraday discs, or homopolar generators."

In front of him, Chrome looked excited, and Kohaku looked lost.

"I don't know what Faraday or homopolar mean, but I understood everything else!" said Chrome eagerly.

Meanwhile, Kohaku gave a small giggle. "I understood copper, Kinro, and Ginro…”

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TAGS: dr stone, ishigami senku, senku x kohaku, senhaku, kohaku, dr stone kohaku, kohasen, dr. stone, dr stone fanfic, dr. stone fanfic, dr. stone kohaku, drstonefanficnostoneunturned  

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[gepetordi1]

This is a homopolar motor.

It’s really easy to experiment with at home. It is driven by the Lorentz force - the force which is exerted by a magnetic field on a moving electric charge. When a battery is placed on top of a magnet, and a wire then connects the top of the battery back down to the magnet, the circuit is complete.

[rlznv]

participating in homopolar dual-cultivation techniques, recording the resonance between women, living through the pinnacle of culture

[hairflaer]

YouTube'da "Basit Homopolar Motor Nasıl Yapılır" videosunu izleyin

[andystechgarage]

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A post shared by Andrew (@andystechgarage)

This is largely what the first #homopolar motor looked like. Ours is made from @lego and we had it at two events recently. One at @zaniacjerseycity and the other at @hudsonmontessorischooljc The kids loved it and we are going to load the clip on YouTube shortly (link in bio). Michael Faraday discovered this while working long hours at the @ri_science in his lab but he used #mercury and a #voltaicpile to power it. The lecture was largely inspired by the work and dedication of the amazing staff at the Royal Institution and also by Marty Jopson. His lecture "Zap, Crackle, Pop" is truly spectacular and the kids have watched it numerous times. ◇ #royalinvitation #christmaslectures #physics #physicsfun #physicslesson #physicslecture #learningeveryday #learningisfun #learning #learningbyplaying #stemtoys #stem #stemed #stemeducation @andystechgarage #atg #andystechgarage #stemandy #stemeva #stematg #evastem #atgstem #andystem @@legoeducation #lego

[nelc]

Electromagnetic railgun launcher cutaway conceptual design by General Research Corp. depicts the main components for a space-based kinetic energy defense system for applications against hunter-killer satellites and nuclear-armed ballistic missiles. Note the use of a homopolar generator with power supplied to the device from a nuclear reactor and turbine system. Sensors include phased-array radar and long wavelength infra-red. Firing guided projectiles at velocities above 10 km./sec. (6.2 mi./sec.) in laboratory tests with railguns provides a near-term space defense capability.

1984 illustration of Strategic Defence Initiative railgun ABM system

[codigoocultocom]

Adam Trombly, el inventor que asegura estar aterrado luego de crear un dispositivo de energía libre

Adam Trombly, el inventor que asegura estar aterrado luego de crear un dispositivo de energía libre

Grandes inventores muchas veces deben ocultar logros que beneficiarían a la humanidad, por temor a ser ridiculizados o eliminados. Existen diversos ejemplos de posible silenciamiento en que entran en juego millonarios intereses que han evitado que grandes inventos salgan a la luz. Es el caso de Nikola Tesla con su propósito de energía eléctrica inalámbrica, […]

LEE MÁS

[techplanetlife]

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DIY Button Battery Homopolar Motor⚡ Follow @techplanetlife

[onetrainscifi]

Do you ever think about how Ben has lost two of the people closest to him? And how like hearing from Alex probably about Javi's final moments (as far as they know) must've gutted him and made him feel equally proud and guilty because Javi held out as long as he could for the mission, for Mel. And Ben must sometimes feel that it should be been him, he's the one Wilford hated, he's the one who taunted and snarked back while Javi was ALWAYS so focused ("guys, can we get back to the engine please?"). And when Ben was so cut up over Melanie he couldn't even finish his sentences Javi had become his support and rock, not really filling the whole Melanie left behind but definitely taking up a bit more space in Ben's heart because they'd always been thrown together, the three of them, but he hadn't pit in as much time cultivating his friendship with Javi because Javi was always just there. And he'd thought they'd have time. And Ben probably thought it'd be bad enough to have to tell Mel about Javi when they got her back, but now? Now that Alex and Layton have told him she's gone too? The woman who could literally do anything, kludge together a homopolar motor out of chicken wire and a walkie talkie and down six cups of coffee before eight in the morning-the woman he'd always believed could do anything?? Whose smile was like sunlight in a world locked in perpetual midnight? To never hear her snore again or watch her bite her lip as she worked out an impossible equation in her little logbook--to lose her, after holding out hope for so long, fighting for it for so long despite Wilford's knives--to know that they failed. That it was all for nothing because they were too late--he lost hos best friend and the woman he loved all at once and just the fact that he had to get the news second hand both times?? And the fact that maybe they'd all been a little comparative with each other, joking and running each other about ways to prove who's number one in the world--and how Ben probably never wanted to claim that title like this.

Hey hi WHO THE FUCK GAVE YOU THE RIGHT-

[kurtbrussels]

bipolar.... apolar.... panpolar...... homopolar???

lesbian

[kalifissure]

I'm now thinking the universe works like a huge van der Graff generator. Particles gain voltage/energy from being pulled apart. The charge separation that is created overall in space due to gravity, like some crazy huge liquid dielectric van der Graff, drives the universe. And if those recent polarization analyses of cmb, showing a torsional aspect, are correct then the universe is a homopolar generator?

[kenstewdivorce]

calls major depressive disorder homopolar

[senkuslab]

Electricity: Dynamos

After obtaining strong magnets, it’s time to generate electricity! In Ch 25, Senku accomplishes this in the stone world by building a dynamo, or rather the precursor to modern dynamos. What he makes is specifically a homopolar generator, also known as a disk dynamo or Faraday wheel, among other names, and was developed by our good friend Michael Faraday.

So how does this thing work? Remember Faraday’s law from the previous magnet post, how moving a coil in a magnetic field can induce a current? The same thing is happening here: when the copper disk spins, the electrons in the part that passes through the magnetic field start moving. This creates an electromotive force (emf), which is actually the amount of energy per unit of charge, rather than an actual force.

If you look closely at the image above, you can things connected to the edges and axles of the disks. Or here’s a clearer diagram from the manga:

There’s a potential difference (or voltage) between the edge and the center of each disk, and when you close the circuit with something like a lightbulb or bamboo fiber (called an electrical load, whatever is consuming the electrical power), an electric current starts to flow.

This kind of dynamo is actually pretty inefficient when it comes to generating voltage, due to counterflows of current where the current would flow backwards outside of the magnetic field. The original Faraday wheel actually just had one of those wheels, but by linking two of them up in series like this, the voltage produced is doubled. Plus the disks are really big, so that probably helps. I don’t remember which chapter this was mentioned, but I believe Kinro and Ginro were able to produce 3 volts of electricity by spinning these things.

I found a couple videos as well, describing how these dynamos work, which I’ll put below the cut.

As always, if you have any questions or corrections, send them my way!

Sources

https://en.wikipedia.org/wiki/Dynamo

https://en.wikipedia.org/wiki/Homopolar_generator

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html

https://www.britannica.com/science/electromotive-force

https://en.wikipedia.org/wiki/Electromagnetic_induction

https://en.wikipedia.org/wiki/Voltage

https://edisontechcenter.org/generators.html I dont think I used this one but there’s more stuff on generators and dynamos (the more modern type of dynamo, rather than a Faraday wheel)

Videos

Fun fact: Senku’s E=MC2 gets changed to the equation for Faraday’s law (and Lenz’s law, from the negative sign) on the cover of Z=25.