The strip expands and contracts along with the sender’s magnetic field. When the sender’s pulse stops, the strip keeps vibrating for a tiny bit of time, emitting an AC magnetic field that’s ...

This is alternating current or ac. The output of an alternator can ... increasing the rate of rotation increasing the strength of the magnetic field increasing the number of turns on the coil ...

For the first time astronomers have succeeded in observing the magnetic field around a young star where planets are thought ...

The coil is fed with AC. The magnetic field from the coil induces an opposite field in the copper ring that is out of phase with the exciting field. The two fields combine to produce a force on ...