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In today's video, we will talk about the coil. First, we will learn how the coil works, the idea of its operation, and its function in electronic circuits. We will also learn how the coil behaves with direct and alternating current. After that, we will learn about the types of coils that we may encounter, and we will see this on more than one occasion to learn about the different types of coils. We will also learn how to connect coils in parallel and in series. We will also learn about the coil symbol on the schematic. After that, we will learn how to measure the magnetic induction of the coil, which is measured in a unit called Henry. Finally, we will see the magic that the coil does with frequencies and how it removes any frequency in the signal through an oscilloscope. We will make a simple comparison of the signal before and after the coil.