An inductor works by storing electrical energy in the form of magnetic energy. This happens when an electrical current passing through the inductor creates a magnetic field around it.
Magnetic cores are typically made of materials with high magnetic permeability, such as iron, nickel, or cobalt alloys.
Yes, depending on the damage, an induction coil can often be repaired by replacing the damaged wire or insulation.
A common mode choke filter is used to filter out noise that is common to two or more lines in an electrical circuit.