Plotting compasses can also be used to see the magnetic field around a solenoid. To make a loudspeaker cone vibrate correctly, the electric current must vary in the same way as the desired sound.

Treatment with electromagnetic therapy usually comes ... your magnetic fields are out of balance. If you put a magnetic field near your body, it's believed things will go back to normal.

Swap the terminals around so the current flows ... The fundamental fact that every electric current always generates a magnetic field is called Ørsted's law. The Danish scientist Hans Christian ...

Around the same time ... for the engineers out there). That electromagnet generates a strong magnetic field, which then interacts with that of the Earth’s to enable the satellite to point ...

Yet lots of strange experiments show copper behaving a bit weirdly around magnetic ... coils of wire can generate a magnetic field in a metal core, creating an electromagnet.

See all that stuff around you? Everything ... This will create a magnetic field, and other wires with electric current will experience a magnetic force. Imagine you have two parallel wires ...

The magnetic field around the M87 black hole ... dust and all forms of electromagnetic radiation - gets dragged into oblivion. "By imaging polarized light from hot glowing gas near black holes ...

There is always a cusp or open region of the Earth's magnetic field around the north and south ... by the magnetosphere by shedding it through electric currents. These electric currents flow ...

And all these little dust grains have little magnetic fields associated with them, because all the grains are made of electric charges and they're spinning around themselves. When light from ...

It extends out into space, wrapping us in an electromagnetic blanket that ... a “failed reversal” of the Earth’s magnetic field around 41,000 years ago in which the magnetic poles briefly ...