This is neat
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26 comments displayed.
#2 to #1
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Tusura (01/02/2016) [-] My guess is it will increase based on the voltage of the battery. In this case it's 1.2V-1.5V for a AA battery.
As for RPM of the mechanism, I have no clue. I don't know the calculation for it, and I can't remember anything from high school physics.
sciencexplain can you shed more light on this?
As for RPM of the mechanism, I have no clue. I don't know the calculation for it, and I can't remember anything from high school physics.
sciencexplain can you shed more light on this?
#4 to #2
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sciencexplain (01/02/2016) [-] >>#1, Firstly, let's assume the resistance of the created circuit is a constant, it's most likely. Therefore, the voltage = current/resistance. To increase voltage, the current must increase or resistance must decrease, but as already stated, R is constant. Therefore, voltage increases with current, so to increase battery voltage would either mean increased current or decreased resistance. Either way, we'll ignore that, because internal resistance of cells and batteries is too complex for me to explain simply to you. Just acknowledge that, as the current/voltage increases or resistance decreases (very unlikely), the speed should theoretically increase.
The speed in RPM of this homopolar motor cannot be established easily. Depending on the charge of the battery, the strength (hate that word) of the motor due to it's current, etc. will alter the revolutions it makes. You can make one at home and time it, but as the chemical reaction in the battery fails, the speed will drop down with a weaker field. I can't actually give you an accurate value, unfortunately, there are just too many unknowns. Because this experiment has no practical use, nobody really cares for calculations for it, and I'm not going to try and make one to guess an average. It's easily done at home, best metal disc to use is neodymium if you're going to try. I'm happy to try and explain some other stuff, but this is just too vague for me.
It's far too late at night for me to re-read this **** . There's probably errors, but idgaf.
The speed in RPM of this homopolar motor cannot be established easily. Depending on the charge of the battery, the strength (hate that word) of the motor due to it's current, etc. will alter the revolutions it makes. You can make one at home and time it, but as the chemical reaction in the battery fails, the speed will drop down with a weaker field. I can't actually give you an accurate value, unfortunately, there are just too many unknowns. Because this experiment has no practical use, nobody really cares for calculations for it, and I'm not going to try and make one to guess an average. It's easily done at home, best metal disc to use is neodymium if you're going to try. I'm happy to try and explain some other stuff, but this is just too vague for me.
It's far too late at night for me to re-read this **** . There's probably errors, but idgaf.
#21 to #9
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sciencexplain (01/03/2016) [-] Oh ******* christ, why did I put that slash there? Just ignore that, I knew it was gonna be wrong somewhere. I know it's V=IR I SWEAR
#25 to #24
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sciencexplain (01/03/2016) [-] Yeah, the forwardslash made me get it the wrong way round. Eh, whatever.
#16 to #4
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iderpedintofj (01/03/2016) [-]
"strength (hate that word)"
Why not just call it what it is? (Torque)
All that's going to affect is its acceleration in RPM's though.
Why not just call it what it is? (Torque)
All that's going to affect is its acceleration in RPM's though.
#22 to #16
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sciencexplain (01/03/2016) [-] If I say torque, they'll probably end up saying "what's torque?" and I have to describe that to them too. Although it's basic, I just use the words that make most sense for the people reading it, I don't want to go into things like moments or **** like that to describe it.
#3 to #2
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dutchfag (01/02/2016) [-] I used to make these all the time when I was bored in shop,
Im not here to explain science stuff, just what I picked up from making these
Things that impact the speed are how charged the battery is, how strong the magnet is and the amount and type of wire you use.
It went fastest for me, with an AA, decent magnet and thin copper wire
Im not here to explain science stuff, just what I picked up from making these
Things that impact the speed are how charged the battery is, how strong the magnet is and the amount and type of wire you use.
It went fastest for me, with an AA, decent magnet and thin copper wire
#5 to #3
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sciencexplain (01/02/2016) [-] If you consider doing it again, just bear in mind: Larger wire = Greater cross-sectional area, therefore more area to conduct and can support a larger battery/cell. Resistivity is a constant, but no wire is probably better than copper in terms of access and practicality.
#15
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notenoughtortillas (01/03/2016) [-] >use battery thing to spin metal thing
>use spinny thing to power another battery
>new battery has spinny metal thing on it
infinite energy
>use spinny thing to power another battery
>new battery has spinny metal thing on it
infinite energy
#17 to #15
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misternobodie [OP](01/03/2016) [-] There are lots of videos on YT like:
'' Governents dont want you to know this: Source of infinite energy ! ''
or
'' Free energy revealed: how to **** power companies ! ''
Theyre all with some magnets and what you talked about, and they seem to work too. Check em out. funnily theyre done with computer fans
'' Governents dont want you to know this: Source of infinite energy ! ''
or
'' Free energy revealed: how to **** power companies ! ''
Theyre all with some magnets and what you talked about, and they seem to work too. Check em out. funnily theyre done with computer fans
#20
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ILoveFurries (01/03/2016) [-] Well that would explain it. Got bored one day and tried recreating this. Let it sit there for a minute or so without it spinning so I went to take the paperclip off and burned my fingers.
Turns out I forgot the magnet part.
Turns out I forgot the magnet part.
