When current flow in a coil induces an emf within itself, this phenomenon is referred to as __________.

Self induction is the phenomenon where a changing current in a coil creates an electromotive force (emf) within that same coil due to the magnetic field generated by the current itself. When the current changes, the magnetic field also changes, resulting in a change in magnetic flux through the coil. According to Faraday's law of electromagnetic induction, this change in magnetic flux induces an emf that opposes the change in current, which is a principle known as Lenz's Law.

The significance of self induction is crucial in the operation of electrical devices like transformers, inductors, and chokes, where control over current flow is essential. This phenomenon allows these devices to regulate and maintain stable operations in circuits by providing feedback that counteracts sudden changes in current. The understanding of self induction is fundamental for those involved in electric station operations, as it influences how circuits are designed and managed in power systems.