When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram ... This self-sustaining loop is known as the geomagnetic dynamo. Energy is needed ...

Random pieces of wire may pull in ... inner and outer halfway around. The idea of a loop antenna is simple enough. It’s an inductor intended to respond to the magnetic portion of the wave ...

This is called electromagnetic induction close electromagnetic inductionThe production of a potential difference (voltage) when a conductor, such as a wire, is moved through a magnetic field or ...