Dipole Moment

But with magnetism you always have a dipole.

Magnetism always comes in the form of a dipole.

What does a dipole mean?

Magnetic Moment

And it actually turns out that even one electron is still a magnetic dipole.

So everything we've seen in nature has been a dipole.

The south pole of my magnet here is going to be attracted to Earth's magnetic south.

Magnetic north is the geographic location, where the north pole of a magnet will point to.

Magnetic Pole

So if this side of my magnet is attracted to Earth's north pole then Earth's north pole or Earth's magnetic north actually must be the south pole of that magnet.

And the geographic south pole is the north pole of the magnet.

Vostok Station, S Magnetic Pole

That the north pole is going to be attracted to the south pole of another magnet.

So if this is a magnet, we know that a magnet always has two poles.

Dipole

And there's another notion of magnetic north.

So that might be magnetic north.

And that if I were to flip this magnet around, it would actually repel north two north facing magnets would repel each other.

So magnetic north might be here.

And magnetic south, I don't know exactly where that is.

This is actually going to be some physics on electricity, magnetism and torque, and that's essentially the applications of the cross product, and it'll give you a

It's been 780,000 years since this happened.

Which is actually the north pole of the magnet we call Earth.

So if the Earth was a big magnet, you would actually view that as a south pole of the magnet.

The major programmes are Antarctic Magnetosphere Ionosphere Ground base Observations (AMIGO), Southern Hemisphere Auroral Radar Experiment (SHARE) and General Magnetospheric Studies and Ozone Studies.

There's diatoms made out of SIO2, and they're magnetotactic bacteria that make small, single domain magnets used for navigation.

(c) Mission IBIZA registration of the plasma accelerated in the geomagnetic auroral regions, interaction of ionized particles with the ionosphere and magnetosphere of Earth, creation of electromagnetic disturbances

But magnetic north is actually roughly in northern Canada.

This is especially important well, we'll use it in torque and we'll also use it in magnetic fields, but it's important in both of those applications to figure out the components of the vector that are perpendicular to either a force or a radius in question.

Scientists wishing to study the interactions of the solar wind with the polar magnetic cusp near the magnetic north pole can use sounding rockets launched from Svalbard.

But in general, when most people refer to magnetic north, or the north pole, they're talking about the geographic north area.

This will offer research groups a unique opportunity to launch rockets both along and across magnetic field lines in the polar cleft.

And this extremely thin layer is able to levitate more than 70,000 times its own weight.

Number five, one of my favorites reversal of the Earth's magnetic field.

They must keep the opposing poles in balance and lift the machine.

Rectangle Draw a rectangle

You know the rules. The rules are the rules.

The memory was in cathode ray tubes a whole bunch of spots on the face of the tube very, very sensitive to electromagnetic disturbances.

Filled rectangle Draw a filled rectangle

Because when people first discovered these lodestones, or they took a lodestone and they magnetized a needle with that lodestone, and then that needle they put on a cork in a bucket of water, and that needle would point to the

Rectangle Click this to start drawing a rectangle.

Lock tape drive on mount

Eject tape on unmount

And these tin particles were deposited on the tape heads and were crashing the tape heads.