Permanent magnets seems to have different properties to electromagnets, such that electromagnets can be used for induction and energy transfer if a conductor is placed within their changing magnetic field.
So I understand that an electromagnet will have a changing magnetic field, which in turn generates a changing electrical current in a conductor placed within this magnetic field.
My question is, do permamant magnets generate this same electric current if a conductor is placed within their magnetic field?
I.e. if I had a strong permanent magnet, would I be able to generate a current in a coil if it was brought into the permananet magnet's magnetic field?
Best Answer
To answer your question in one word, "Yes"
Now, onto the explanation:-
According to Faraday's Law, you will get a current in a conductor when the amount of magnetic flux linked with the conductor changes.
Note that it is immaterial whether the source of the magnetic field is a permanent magnet or an electromagnet. All that needs to happen for you to detect a current in the conductor is for the flux to change.
In case of the electromagnet, when you change the strength of the field; the flux linked with the coil changes and current is induced.
In case of the permanent magnet, your field is fixed; you can't change it. But, if there is relative motion between the permanent magnet and the coil; then the flux linked with the coil will change and if that happens,current will definitely be induced.