Likewise, a wire passing through a magnetic field creates an electric current within the wire. This is the basic principle that allows electric motors and generators to operate. In the Earth (see ...

which can reveal the strength and orientation of Earth's magnetic field. When the team tested tiny iron particles from the Isua formation, the results showed a field strength of 15 microtesla ...

Earth's magnetic field occasionally bursts into ... Because those waves of radiation are forming along a magnetic field, whose strength and charge form a gradient in space, the waves end up ...