The current then chills as it flows from the tropics toward the far North Atlantic off Greenland. Since colder, saltier water is denser than warmer, fresher water, the flow sinks and returns ...

The Agulhas Current flows south along the western side of the Indian Ocean. When it reaches the southern tip of Africa, it sheds swirling vortices of water called Agulhas Rings.

AC’s ubiquity dates from the so-called “war of the currents” that accompanied electrification in the 1880s and 1890s. When electricity flows down a line as AC, energy travels as a wave.

In contrast to alternating current, or AC, which, depending on the supply's frequency, switches direction 50 or 60 times per second, the current in DC circuits flows only in one direction.

We made a handy ac-current probe, a Magnepick. It is simply a toothpick with three to four turns of a thin wire making a tiny coil on its tip. It picks up the magnetic field parallel to the toothpick.

Light flows through the waveguide (a tiny wire measuring 1.5 microns wide and 0.22 micron high) just like electrical current flows through a copper wire.

The handedness or “chirality” of electrons affects how current flows in graphene transistors, according to new work done by researchers in the UK and Russia. The team’s findings could help to make ...