Yes it is true it is used in Transformers and it works with alternating current and direct but if direct then it only produces it for a very short time. Not sure why it happens cause i am only gcse but I am sure if you look up transformers then you will find out how they work.
A changing magnetic field induces an electric current in a conductor.
The magnitude of the magnetic field is decreased
When a magnetic field is applied to a loop, it induces an electric current in the loop.
Passing a wire near a magnetic field induces an electric current in the wire.
It induces an electrical current
When a coil of wire moves through a magnetic field, the changing magnetic field induces a current in the wire through electromagnetic induction.
The magnetic field in an alternator is created by the rotor, which is an electromagnet that produces a rotating magnetic field as it spins. This magnetic field induces an alternating current in the stator windings through electromagnetic induction, which is then converted to usable electrical power.
Induced
The magnet induces magnetism in the iron - small magnetic regions in the iron become aligned, due to the magnetic field.
This part forms the field circuit. It is a rotating part with a magnetic field that induces current into the stator
This part forms the field circuit. It is a rotating part with a magnetic field that induces current into the stator
This part forms the field circuit. It is a rotating part with a magnetic field that induces current into the stator