hi there is this video of artistic
looking wires placed on a battery and
then suddenly they start turning surely
it must be the everyday Facebook wall of
sugar I mean how does it even run only
from one side of the battery oh hey look
there is a single wire right here
shorting the battery simple motor
battery there is a bunch of videos on
such a simple motor
they usually stick a battery on a magnet
stick a wire on top of it and bam it
starts turning at first glance it looks
pretty fake but at second glance and
some analysis it still looks pretty fake
I mean with the magnet at the bottom
it's outside the loop at the top but it
gets the fields and the current runs
from top to bottom I think this is a job
for the rectifier that's a very
underwhelming intro do it again see as
usual nobody explains it so I have to
use my genius they must be blowing air
on the wire to make it turn yes I have
my doubts don't we need alternating
current through the wires here I have a
loop of wire connected to the live lines
close to the magnets so when I plug it
in it should turn or vibrate too much
voltage let me reduce it by my auto
transformer
okay let's increase the voltage wow it
vibrates whoops
simple enough circuit let's just make it
with a battery and see what happens so I
have a strong new media magnet and I
stick an hour battery on top of it then
I bend some wires to make a shake like
this see one side of the wire touches
one side of the battery and the other
side touches the magnet that touches the
other side of the battery so this will
short the out of the battery and
depending on the type of battery it
could result in a couple of amps through
the wire this will create some what's
decent
magnetic fields around the wires and
kills your battery in a jiffy or a few G
fees okay let's see if it works nothing
it does want to move but it stops I
can't see the sparks and the wire is
getting warm so there is tons of current
how about one loop on one side only ooh
it does want to do something but it
stops
I made a quality loop this one should
turn come on I was really hoping this
would turn maybe the magnet is not
strong enough let me add some more
magnets see these magnets don't want to
go together
unless I rotate them and bam they
connect because they are polarized north
and south on the sides if I rotate it
they disconnect because the same poles
fall on each other I wonder if this is
the problem I have a set of tiny magnets
that are polarized on the opposite
surfaces you can see this by the fact
that if I rotate them they don't
disconnect okay let's stick the battery
on these stick them on the plier so they
won't fall and I have this piece of wire
to go over it hey it fell off I guess we
can hammer a bit of dent on top of the
battery and this way it shouldn't fall
there they go what happens if I put this
one cider on hey it's turning - this is
great
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knew it was real because I'm smart
didn't you say they blow air on it who
are you detective Pikachu get lost
okay now that we know it works in a
specific magnet orientation it should be
easy to understand why we have electric
current magnetic fields and the force
that turns the wire so all we need is
the right hand rule here it is if you
don't remember
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all those fingers in this hole if two
fingers match their effectors let's
assume this arrangement the battery
sends an extra current from positive to
negative through both wires the magnetic
fields Direction is always from north to
south
outside the magnets and south to north
inside using the right hand rule the
magnetic field is that way the current
is this way and so the force is pushing
inside the board or basically
perpendicular to the plane of the
winding on this side the magnetic field
is backwards and so the force is pushing
outside the board so the forces always
pull the wires along with them and they
turn same thing with a single wire on
one side what for example if the magnet
orientation is sideways the fields going
through both wires are pointing the same
way so for example the forces are
pushing outside the board on both wires
so it won't turn or it just jumps up the
battery even with the single wire
initially it moves to the other side but
the forces flip and push it back and it
settles somewhere in the middle
everything makes sense now now to make
it more stable we can pull one magnet
from the bottom flip it around and put
it on top of the battery and then stick
a metal washer on top of the magnets
this will help hold the wire even better
so you wouldn't have to hammer the
battery not hammering the battery is
generally a good thing now if we flip
the whole thing around the battery turns
the other way instead of the wire great
it's quite easy to understand there was
another type I'd seen using magnet wire
that's coated so that the windings won't
short to each other make a few loops of
winding like this now look the excess
length of wire around the winding so it
doesn't unwind like this now this is
important
using a sandpaper remove the coating on
both sides of the winding on one side of
the wire in this position
then taped who safety pins to the end of
the battery that will hold our winding
now we stick our magnets on the battery
that are also polarized with north and
south on the surfaces now if you put the
winding in there it starts turning how
you ask
Elementary if the winding is in a
position that the wires are touching the
contacts and the current for example is
running that way then on top of the loop
the current is going this way and on the
bottom that way but the magnetic fields
would be going up and about around the
same direction through both sides of the
windings which means using the right
hand rule the force on the top side
would push one way and on the bottom
side the other way but with these forces
if the loop keeps turning they will end
up pushing the loop back until it
settles somewhere in the middle and it
won't turn and that's why we removed
half of the coating from the wire so it
only connects to the contacts for half
the turn so the loop starts turning but
before the forces can slow it down
they're winding disconnects from the
battery and the forces disappear because
of the coating on the wire the loop
continues turning because of its inertia
until the wire connects again and the
forces come back and it keeps turning
like this these are great concept motors
very good for demonstration and
understanding the forces and fields did
you know that this motor is very much
the same as the first ever magnetic
motor created by Michael Faraday this is
what made him famous and exposed his
genius and led to electric motors that
change the wall now maybe you can come
up with a whole new and improved motor
structure and change the world all over
again but first you might want to
improve your knowledge and critical
thinking so hop on to brilliant
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not only you will be addicted but also
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say Sudoku that teaches you nothing
nothing okay maybe a way of solving a
certain problem but that's it
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