How does induction work.We know generators in power stations create electricity using magnetism.We know where there is a electric current there is a magnetic field.We know turning a magnetic on and off will create electricity but a magnetic stationary will not.
Does the magnetic have to move ? We know the coil the more coils the stronger the magnetic field but what really is the coil use for.
I seem to be having a problems understanding how induction works and the relationship of electricity and magnetism.
13. August 2010 at 3:55 am
Generators, motors, and transformers work on two principles:
Current flowing in a wire creates a magnetic field (Ampere’s law).
A changing magnetic field induces a voltage in a coil (Faraday’s law).
So for a generator to work, there has to be a changing magnetic field. This can be done by spinning permanent magnets or electromagnets, or by spinning a coil in a stationary magnetic field.
There is another use for the word induction. There are synchronous generators and induction generators. I won’t get into the details of the differences, but they both use induction to generator voltage in the output coil(s). Power stations use synchronous generators.
I’ve attached some references that explain various aspects in greater detail.