Iron increases impedance

Experiment no.: 6.4.18
Eisen vergrössert Impedanz
The current in a coil carrying an alternating current is measured. This can be used to demonstrate how the impedance of the coil changes when iron is placed in the coil.

Images for this experiment

Coil without iron yoke
Coil on open iron yoke
Coil on semi-closed iron yoke
Coil on closed iron yoke