Self-induction is a term used to describe the phenomenon in which a changing magnetic field induces an electromotive force (EMF) in a coil of wire to produce an electric current. Other words that can be used to describe self-induction include self-generation, self-electromotive force, and self-energy. In addition, self-inductance refers to the property of a coil to produce a magnetic field when an electric current is passed through it, which can also be described as self-field or self-magnetization. Other related terms include mutual inductance, which describes the effect of one coil inducing an EMF in another coil, and inductive reactance, which is a property that opposes changes in the flow of electric current in a circuit.