It is known that the thermoelectric efficiency of some materials can be considerably enhanced in a magnetic field (examples are bismuth-based alloys which are used for low-temperature refrigeration).

For example, bringing a north pole and a north ... Iron is magnetic so the liquid iron causes Earth to have a magnetic field. The needle of a compass is a small magnet that can turn.

An example of the 3.7 billion year old banded ... These results provide the oldest estimate of the strength of Earth’s magnetic field derived from whole rock samples, which provide a more ...

When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right). Likewise, a wire passing through a magnetic field creates an electric current ...