Dynamically induced electromotive force (emf) can be produced in two main ways:
- By moving a conductor through a magnetic field:
When a conductor (like a wire) moves through a magnetic field, the magnetic flux through the conductor changes. This change in magnetic flux induces an emf in the conductor, according to
Faraday's Law of Induction. The faster the conductor moves or the stronger the magnetic field, the greater the induced emf.
- By changing the magnetic field around a stationary conductor:
If the magnetic field around a conductor changes (for example, if the strength or direction of the magnetic field varies), the change in magnetic flux through the conductor induces an emf. This is because a change in the magnetic field over time causes a change in the flux, which generates an induced emf, as per
Faraday's Law.
In both cases, the induced emf is the result of a changing magnetic field relative to the conductor.
