What It Does An inductor is another type of energy-storage device, but it stores electrical energy in a magnetic field. In its simplest form, an inductor is just a coil of wire. The amount of energy it can store, known as its inductance, depends on the number of loops in the wire, but it’s also affected by the material inside the coil (the core). Using a core made of a ferromagnetic substance, like iron, greatly increases the inductance compared to just air.

A Simple Analogy Think of an inductor as a heavy water wheel in our pipe analogy. It takes a bit of effort (energy) to get the heavy wheel spinning. But once it’s spinning, its momentum keeps it going and it resists any sudden changes in the water’s flow (the current). It works to keep the current steady.

Key Details Summary

The principles of magnetic fields are crucial not just for storing energy, but also for changing it, which brings us to our final component.