When currents in wires run parallel, the wires attract due to the magnetic fields from the currents and the Lorentz force. The currents can also be run anti-parallel, making the wires repel. Place the ...

Ampère was playing with wires when he discovered a fundamental law of electromagnetism. Hans Christian Oersted had just discovered the connection between electricity and magnetism. Meanwhile, a French ...

The simplest complete circuit is a piece of wire from one end of a battery to the other. An electric current can flow in the wire from one end of the battery to the other, but nothing useful happens.