I had cause to demonstrate the magnetic field around a wire, and ended up with an 8A current in a vertical wire, battling with the Earth’s magnetic field. My borrowed idea was to put a ring of eight ...

When roles are inverted, and one tries to send magnetic field from the second to the first, no magnetic field is transferred,” says Prat-Camps, who is now at the University of Sussex in the UK. “When ...

If you made a motor out of a magnet, a wire coil, and some needles, you probably remember that motors and generators depend on a rotating magnetic field. Once you know how it works, the concept is … ...

The Wiegand effect, a phenomenon discovered in the 1970s, is the unusually useful behavior of magnetic fields in specially designed wire that outputs voltage. This Wiegand wire, as it's called, is ...

The magnetic field that surrounds our planet is constantly shifting. But lately, near the Arctic, it’s been so active that researchers had to release a crucial update to the World Magnetic Model ...