And I mean what is happening on an atomic level that is not happening with DC so that induction can occur? I’ve been doing a lot of reading to wrap my head around it but I can’t seem to get an answer that explains what is happening throughly, just a lot of “just because”. What is going on with the electrons that allows them to transfer over to the second coil that does not occur with DC?
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Let’s skip the primary side of the transformer and just look at the secondary side first.
It is a change in the magnetic field that creates a current in a wire. So for induction york, you need a magnetic field that changes over time.
If a constant magnetic field could create a current then just putting a magnetic net to a wire would result in a current constant current. That does not occur. You do get a current when you place or remove the magnets but not when it is stationary.
So to create a current you can have a moving magnet for example a spinning magnet beside a coil, The rotation will change the magnetic field and create a current that changes over time depending on how fast the magnetic field changes. This is how generators work and what they produce is AC.
Then a look at the primary side.
A current through a wire creates a magnetic field around the wire so we can use that phenomenon. To get a changing magnetic field you need a changing current through the wire, that is AC.
Put that next to a magnet that can rotate and you have created an electric motor.
All electric motors require AC in the coils. A DC motor uses a commutator to make a switch that changes how the wires are connected to the cold and create AC. It is like if you connect a battery to a child and then physically rotate the battery so its connections are reversed.
If you put the two coils together one creates a changing magnetic field. The other will create a charging current from the changing magnetic field.
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