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 ...

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.

"The picture where the current flows along the edges can really nicely explain how you get that quantization. But it turns out, it's not the only picture that can explain quantization," Nowack said.

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.

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.

The August weather might seem ideal for a beach trip, but Hurricane Erin will bring widespread danger in coming days.