You know what would happen if we could have coupling coefficient in transformers greater than 1...?
Answer is that we could have solve our energy problem...!!!
I wonder why EC give us this option in transformers, it's impossible to have coupling coefficient greater of 1, that means that when the primary is the source of the magnetic flux, more flux enter the secondary winding than the primary. Coupling coefficient is always between 0 and 1.
Press the button to add some noise to the circuit and see what happens.
What you 'll see it's not a bug, it's all consequence of having a coupling coefficient greater of 1. The source of the free energy is the extra flux created in the secondary winding.